[User32] Add Back Break with Error Message

Add back missing break. See CORE-17856.

win32ss/user/user32/windows/class.c

@@ -1134,6 +1134,8 @@ LONG_PTR IntGetWindowLong( HWND hwnd, INT offset, UINT size, BOOL unicode )
         {
             SetLastError(ERROR_ACCESS_DENIED);
             retvalue = 0;
+            ERR("Outside Access and Denied!\n");
+            break;
         }
         retvalue = (ULONG_PTR)IntGetWndProc(wndPtr, !unicode);
         break;