[PWGJE] jetChargedV2 task: use median rho when the integral value is <= 0

[YubiaoWang]

Switch to the median rho instead of using zero when the local rho integral is zero.

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 0 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for bbdc11e at 2026-07-05 23:42:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 30 errors and 14 warnings.'
Found 30 errors and 14 warnings.
++ [[ 30 -gt 0 ]]
++ cat /sw/BUILD/18d5743fd70514b27c66740bac59907649bcdfb9/O2Physics-code-check/errors.txt
PWGJE/Tasks/jetChargedV2.cxx:55:8: error: constructor does not initialize these fields: detId, refAId, refBId, detIdCheck [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:151:31: error: repeated branch body in conditional chain [bugprone-branch-clone,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:153:7: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:183:24: error: initializer for member 'randomNumber' is redundant [readability-redundant-member-init,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:921:5: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:957:18: error: variable 'phiMinusPsi2' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:972:18: error: variable 'phiMinusPsi3' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1047:18: error: variable 'phiMinusPsi2' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1115:18: error: variable 'corrTagjetpt' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1124:18: error: variable 'phiMinusPsi2' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1471:5: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1593:18: error: variable 'phiMinusPsi2' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1660:18: error: variable 'phiMinusPsi3' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1690:16: error: variable 'rcPhiPsi2' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1691:16: error: variable 'rcPhiPsi2Rand' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1719:81: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1725:85: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1741:91: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1750:87: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1763:85: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1908:5: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1980:18: error: variable 'phiMinusPsi2' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:1998:18: error: variable 'phiMinusPsi3' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:2026:16: error: variable 'rcPhiPsi2' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:2032:81: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:2045:91: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:2054:98: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:2068:85: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:2235:9: error: Value stored to 'leadingJetPt' is never read [clang-analyzer-deadcode.DeadStores,-warnings-as-errors]
PWGJE/Tasks/jetChargedV2.cxx:2302:13: error: variable 'tempparaA' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
++ [[ 14 -gt 0 ]]
++ cat /sw/BUILD/18d5743fd70514b27c66740bac59907649bcdfb9/O2Physics-code-check/warnings.txt
PWGJE/Tasks/jetChargedV2.cxx:607:22: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetChargedV2.cxx:617:22: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetChargedV2.cxx:627:22: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetChargedV2.cxx:637:22: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetChargedV2.cxx:660:22: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetChargedV2.cxx:670:22: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetChargedV2.cxx:680:22: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetChargedV2.cxx:731:22: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetChargedV2.cxx:741:22: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetChargedV2.cxx:751:22: warning: statement should be inside braces [readability-braces-around-statements]
[0 more errors; see full log]

Full log here.

[vkucera]

@YubiaoWang Please add info about which part of PWGJE is affected in the title.

[YubiaoWang]

@YubiaoWang Please add info about which part of PWGJE is affected in the title.

Thanks for the suggestion! I have updated the PR title to make it clearer. This PR specifically affects the jetChargedV2 task.

[vkucera]

@YubiaoWang Please add info about which part of PWGJE is affected in the title.

Thanks for the suggestion! I have updated the PR title to make it clearer. This PR specifically affects the jetChargedV2 task.

Thanks!