fix: index_stream tail loop ignored QUERY_REMAP

[ilgrad]

The prefetch-ring flush at the end of index_stream_maybe_remap tests REMAP instead of
QUERY_REMAP, so on a minimal PHF index_stream_maybe_remap::<B, false, _> remaps the last B
keys and disagrees with index_no_remap there. index_stream::<B, _> is unaffected — it passes
QUERY_REMAP = REMAP.

Repro on 2.1.1 and on master: 64 mismatches over 200 builds, all at key index >= n - B. Zero with
this patch.

use ptr_hash::{PtrHash, PtrHashParams};

type Mph = PtrHash<u64, ptr_hash::bucket_fn::CubicEps, Vec<u32>,
                   ptr_hash::hash::StrongerIntHash, Vec<u8>, false, true>;

fn main() {
    let mut bad = 0;
    for seed in 0..200u64 {
        let keys: Vec<u64> = (0..1000u64)
            .map(|i| (i + seed * 1000).wrapping_mul(0x9e37_79b9_7f4a_7c15) ^ 0x1234_5678)
            .collect();
        let f = Mph::new(&keys, PtrHashParams::default_compact());
        let mut stream = Vec::with_capacity(keys.len());
        f.index_stream_maybe_remap::<32, false, _>(keys.iter()).for_each(|s| stream.push(s));
        bad += (0..keys.len()).filter(|&i| stream[i] != f.index_no_remap(&keys[i])).count();
    }
    println!("mismatches = {bad}");
}

Second commit drops a leftover eprintln! in max_index_no_remap().

cargo test --lib --release passes.

[RagnarGrootKoerkamp]

thanks for the fix!