Added a first-cut version of MapVirtualKeyExW() that has the same
functionality (and limitations) as the ANSI version.

diff --git a/include/winuser.h b/include/winuser.h
index 4d486fd..e0a2439 100644
--- a/include/winuser.h
+++ b/include/winuser.h
@@ -3592,6 +3592,7 @@
 UINT      WINAPI MapVirtualKeyW(UINT,UINT);
 #define     MapVirtualKey WINELIB_NAME_AW(MapVirtualKey)
 UINT        WINAPI MapVirtualKeyExA(UINT,UINT,HKL);
+UINT        WINAPI MapVirtualKeyExW(UINT,UINT,HKL);
 #define     MapVirtualKeyEx WINELIB_NAME_AW(MapVirtualKeyEx)
 BOOL      WINAPI MapDialogRect(HWND,LPRECT);
 INT       WINAPI MapWindowPoints(HWND,HWND,LPPOINT,UINT);