C++: Correct false positive. Only TimeConversionFunction that do not auto correct for leap year should be considered.

cpp/ql/src/Likely Bugs/Leap Year/UncheckedReturnValueForTimeFunctions.ql

@@ -46,6 +46,7 @@ class SafeTimeGatheringFunction extends Function {
 
 from FunctionCall fcall, TimeConversionFunction trf, Variable var
 where
+  not trf.isAutoLeapYearCorrecting() and
   fcall = trf.getACallToThisFunction() and
   fcall instanceof ExprInVoidContext and
   var.getUnderlyingType() instanceof UnpackedTimeType and