[gvg] 17883: Only access dwTypeData if the caller pronounced it valid.

Only access dwTypeData if the caller pronounced it valid.
Modified: trunk/reactos/lib/user32/windows/menu.c
  _____  

Modified: trunk/reactos/lib/user32/windows/menu.c
--- trunk/reactos/lib/user32/windows/menu.c	2005-09-16 15:18:23 UTC
(rev 17882)
+++ trunk/reactos/lib/user32/windows/menu.c	2005-09-16 15:34:19 UTC
(rev 17883)
@@ -4646,7 +4646,10 @@

   MENUITEMINFOW MenuItemInfoW;
 
   RtlCopyMemory(&MenuItemInfoW, lpmii, min(lpmii->cbSize,
sizeof(MENUITEMINFOW)));
-  MenuItemInfoW.cch = wcslen(MenuItemInfoW.dwTypeData);
+  if (0 != (MenuItemInfoW.fMask & MIIM_STRING))
+  {
+    MenuItemInfoW.cch = wcslen(MenuItemInfoW.dwTypeData);
+  }
 
   return NtUserMenuItemInfo(hMenu, uItem, fByPosition,
                             (PROSMENUITEMINFO)&MenuItemInfoW, TRUE);