wrong declaration of IsTextUnicode (advapi32)

AdvApi32 redirects this function to ntdll.RtlIsTextUnicode. RtlIsTextUnicode returns a BOOLEAN-(byte)-Value. IsTextUnicode should return BOOL (LONGBOOL).

In MSVC-Builds you can get True instead of False. (only al is set for result).
GCC sets ax, so it makes no differece.