Add more check to avoid access violation.

Signed-off-by: ydong10
Reviewed-by: lgao4

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12470 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Compatibility/FrameworkHiiOnUefiHiiThunk/UefiIfrDefault.c

@@ -358,7 +358,7 @@ UefiIfrGetBufferTypeDefaults (
   ASSERT (UefiDefaults != NULL);
 
   *UefiDefaults = AllocateZeroPool (sizeof (LIST_ENTRY));
-  ASSERT (UefiDefaults != NULL);
+  ASSERT (*UefiDefaults != NULL);
   InitializeListHead (*UefiDefaults);
 
   DefaultLink = GetFirstNode (&ThunkContext->FormSet->DefaultStoreListHead);