[PWGLF] Nuspex: hadron nuclei correlation: fix proton rejection

[ercolessi]

No description provided.

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 5 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for 43d863a at 2026-10-17 00:06:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'To reproduce the results below locally, run: '\''aliBuild build O2Physics-code-check -e ALIBUILD_BASE_HASH=upstream/master'\''.'
To reproduce the results below locally, run: 'aliBuild build O2Physics-code-check -e ALIBUILD_BASE_HASH=upstream/master'.
++ echo 'To apply all automatic fixes, add the '\''-e O2PHYSICS_CHECKER_FIX=1'\'' option.'
To apply all automatic fixes, add the '-e O2PHYSICS_CHECKER_FIX=1' option.
++ echo 'See the documentation for more details at: <https://aliceo2group.github.io/analysis-framework/docs/tools/#running-with-o2physics-code-check>.'
See the documentation for more details at: <https://aliceo2group.github.io/analysis-framework/docs/tools/#running-with-o2physics-code-check>.
++ echo 'Found 2 errors and 1 warnings.'
Found 2 errors and 1 warnings.
++ [[ 2 -gt 0 ]]
++ cat /sw/BUILD/a308f6d31a04de5c181bfed25ee79a1424c1e8e7/O2Physics-code-check/errors.txt
PWGLF/Tasks/Nuspex/hadronnucleicorrelation.cxx:1973:40: error: std::move of the expression of the trivially-copyable type 'value_type' (aka 'GenCoalescenceCandidate') has no effect [performance-move-const-arg,-warnings-as-errors]
PWGLF/Tasks/Nuspex/hadronnucleicorrelation.cxx:1978:38: error: std::move of the variable 'deuteron' of the trivially-copyable type 'GenCoalescenceCandidate' has no effect [performance-move-const-arg,-warnings-as-errors]
++ [[ 1 -gt 0 ]]
++ cat /sw/BUILD/a308f6d31a04de5c181bfed25ee79a1424c1e8e7/O2Physics-code-check/warnings.txt
PWGLF/Tasks/Nuspex/hadronnucleicorrelation.cxx:1752:22: warning: use designated initializer list to initialize 'GenCandidate' [modernize-use-designated-initializers]
++ [[ 2 -gt 0 ]]
++ exit 1
--

Full log here.