[ALICE3] Fix CodeCheck errors in alice3DQTableMaker

[axti98]

No description provided.

[github-actions]

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

[alibuild]

Error while checking build/O2Physics/code-check for ff0ec26 at 2026-08-05 11:23:

## sw/BUILD/O2-latest/log
CMake Error in Detectors/Base/CMakeLists.txt:

Full log here.

[vkucera]

What is CodeCleaner?

[alibuild]

Error while checking build/O2Physics/staging for ff0ec26 at 2026-08-05 10:32:

## sw/BUILD/O2-latest/log
CMake Error in Detectors/Base/CMakeLists.txt:

Full log here.

[alibuild]

Error while checking build/O2Physics/code-check for f5f2e0e at 2026-08-07 21:22:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 2 errors and 2 warnings.'
Found 2 errors and 2 warnings.
++ [[ 2 -gt 0 ]]
++ cat /sw/BUILD/cda5ecd2ff74e692161e7b509d2e23b6eb74e8cd/O2Physics-code-check/errors.txt
ALICE3/TableProducer/alice3DqTableMaker.cxx:312:67: error: narrowing conversion from 'double' to 'Int_t' (aka 'int') [bugprone-narrowing-conversions,-warnings-as-errors]
ALICE3/TableProducer/alice3DqTableMaker.cxx:446:50: error: do not implicitly decay an array into a pointer; consider using gsl::array_view or an explicit cast instead [cppcoreguidelines-pro-bounds-array-to-pointer-decay,-warnings-as-errors]
++ [[ 2 -gt 0 ]]
++ cat /sw/BUILD/cda5ecd2ff74e692161e7b509d2e23b6eb74e8cd/O2Physics-code-check/warnings.txt
ALICE3/TableProducer/alice3DqTableMaker.cxx:143:35: warning: statement should be inside braces [readability-braces-around-statements]
ALICE3/TableProducer/alice3DqTableMaker.cxx:617:31: warning: statement should be inside braces [readability-braces-around-statements]
++ [[ 2 -gt 0 ]]
++ exit 1
--

Full log here.

[vkucera]

Keep it simple.

Suggested change

	auto mcflags = static_cast<uint16_t>(0); // flags which will hold the decisions for each MC signal
	uint16_t mcflags{0}; // flags which will hold the decisions for each MC signal