Avoid casts between LARGE_INTEGER and FILETIME.
Fixed day of week of epoch.
Small cleanups.

diff --git a/include/winbase.h b/include/winbase.h
index 02267ac..95c83ef 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1177,7 +1177,7 @@
 BOOL        WINAPI CopyFileExW(LPCWSTR, LPCWSTR, LPPROGRESS_ROUTINE, LPVOID, LPBOOL, DWORD);
 #define     CopyFileEx WINELIB_NAME_AW(CopyFileEx)
 BOOL        WINAPI CopySid(DWORD,PSID,PSID);
-INT         WINAPI CompareFileTime(LPFILETIME,LPFILETIME);
+INT         WINAPI CompareFileTime(const FILETIME*,const FILETIME*);
 HANDLE      WINAPI CreateEventA(LPSECURITY_ATTRIBUTES,BOOL,BOOL,LPCSTR);
 HANDLE      WINAPI CreateEventW(LPSECURITY_ATTRIBUTES,BOOL,BOOL,LPCWSTR);
 #define     CreateEvent WINELIB_NAME_AW(CreateEvent)