Fix Validate{Rect,Rgn} prototypes.

include/winuser.h

diff --git a/include/winuser.h b/include/winuser.h
index 3a0bba3..6cbe773 100644
--- a/include/winuser.h
+++ b/include/winuser.h
@@ -4384,8 +4384,8 @@
 #define     UnregisterClass WINELIB_NAME_AW(UnregisterClass)
 VOID        WINAPI UpdateWindow(HWND);
 UINT        WINAPI UserRealizePalette(HDC);
-VOID        WINAPI ValidateRect(HWND,const RECT*);
-VOID        WINAPI ValidateRgn(HWND,HRGN);
+BOOL        WINAPI ValidateRect(HWND,const RECT*);
+BOOL        WINAPI ValidateRgn(HWND,HRGN);
 WORD        WINAPI VkKeyScanA(CHAR);
 WORD        WINAPI VkKeyScanW(WCHAR);
 #define     VkKeyScan WINELIB_NAME_AW(VkKeyScan)