Fixed #5031: simplify labs|fabs|abs(-1) to 1.
Fixed #5037 (Add missing C++ std objects and types)
Fixed #5032: fix wrong unittest case in testtoken::matchNumeric.
Fixed #5033 (segmentation fault (valid code) in CheckOther::checkZeroDivisionOrUselessCondition)
Fixed #5030 (Segmentation fault below CheckMemoryLeakStructMember::isMalloc())