[PWGJE] trackEfficiency.cxx itstpcmatching improvement

[aimeric-landou]

No description provided.

[github-actions]

O2 linter results: ❌ 1 errors, ⚠️ 0 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for d762302 at 2026-08-06 17:24:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 4 errors and 0 warnings.'
Found 4 errors and 0 warnings.
++ [[ 4 -gt 0 ]]
++ cat /sw/BUILD/b22e6ea3325833d2464ad84526a65e2e9bedaf8b/O2Physics-code-check/errors.txt
PWGJE/Tasks/trackEfficiency.cxx:47:8: error: constructor does not initialize these fields: pdg [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
PWGJE/Tasks/trackEfficiency.cxx:175:139: error: the parameter 'tracks' is copied for each invocation but only used as a const reference; consider making it a const reference [performance-unnecessary-value-param,-warnings-as-errors]
PWGJE/Tasks/trackEfficiency.cxx:200:9: error: boolean expression can be simplified by DeMorgan's theorem [readability-simplify-boolean-expr,-warnings-as-errors]
PWGJE/Tasks/trackEfficiency.cxx:1485:52: error: no header providing "kPDecay" is directly included [misc-include-cleaner,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 4 -gt 0 ]]
++ exit 1
--

Full log here.