fix Warning

qt6-after/qt6-migrated-legatus/Lts/Services/AreaEffectSimulation/UnitTest_FireAutomaton/aes_test_fire_automaton.h

@@ -49,7 +49,9 @@ private:
   qint64 m_finishedTime;
 };
 
-static bool withinTolerance(qint64 measured, qint64 expected, qint64 tolerance) {
+// defined but only used by aes_test_fire_automaton.cpp; AUTOMOC pulls the header
+// into a separate TU that never calls it, so mark it to suppress -Wunused-function
+[[maybe_unused]] static bool withinTolerance(qint64 measured, qint64 expected, qint64 tolerance) {
   return qAbs(measured-expected) <= tolerance;
 };