Fixed #6229 (Move Windows builtin types __intXX to library)
Reuse code in isXNumber() to avoid duplication and unneeded computations
Merge pull request #455 from Dmitry-Me/refactorNumberIsX

Reuse code in isXNumber() to avoid duplication and unneeded computations
Fixed #4776 (FP: Assignment of function parameter has no effect outside the function, with goto)
Fixed #6231 (mingw compiler error: Path::getAbsoluteFilePath)