wow64win: Support GCLP_MENUNAME in NtUserSetClassLongPtr thunk.

dlls/wow64win/user.c

@@ -3297,6 +3297,16 @@ NTSTATUS WINAPI wow64_NtUserSetClassLongPtr( UINT *args )
     LONG_PTR newval = get_ulong( &args );
     BOOL ansi = get_ulong( &args );
 
+    if (offset == GCLP_MENUNAME)
+    {
+        struct client_menu_name menu_name;
+        struct client_menu_name32 *menu_name32 = UlongToPtr( newval );
+        NtUserSetClassLong( hwnd, offset,
+                            (UINT_PTR)client_menu_name_32to64( &menu_name, menu_name32 ), ansi );
+        client_menu_name_64to32( &menu_name, menu_name32 );
+        return 0;
+    }
+
     return NtUserSetClassLongPtr( hwnd, offset, newval, ansi );
 }