- Fixed GetSystemTimeAdjustment prototype and added it to winbase.h.
- Fixed DosDateTimeToFileTime, FileTimeToDosDateTime,
  LocalFileTimeToFileTime, FileTimeToLocalFileTime and
  SystemTimeToFileTime.

diff --git a/include/winbase.h b/include/winbase.h
index 769bab0..19447c3 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1326,6 +1326,7 @@
 VOID        WINAPI GetSystemInfo(LPSYSTEM_INFO);
 BOOL        WINAPI GetSystemPowerStatus(LPSYSTEM_POWER_STATUS);
 VOID        WINAPI GetSystemTime(LPSYSTEMTIME);
+BOOL        WINAPI GetSystemTimeAdjustment(PDWORD,PDWORD,PBOOL);
 VOID        WINAPI GetSystemTimeAsFileTime(LPFILETIME);
 DWORD       WINAPI GetTapeParameters(HANDLE,DWORD,LPDWORD,LPVOID);
 DWORD       WINAPI GetTapePosition(HANDLE,DWORD,LPDWORD,LPDWORD,LPDWORD);