ChangeDisplaySettingsExA: don't leak the memory for the converted DEVMODEW

svn path=/trunk/; revision=41393

reactos/dll/win32/user32/misc/display.c

@@ -477,6 +477,9 @@ ChangeDisplaySettingsExA(
 
   rc = NtUserChangeDisplaySettings ( pDeviceName, pDevModeW, hwnd, dwflags, lParam );
 
+  if (pDevModeW != NULL)
+    RtlFreeHeap(GetProcessHeap(), pDevModeW);
+
   if (lpszDeviceName != NULL)
     RtlFreeUnicodeString ( &DeviceName );