Bug 424300, r+sr=peterv

--HG--
extra : rebase_source : 56e3b2e745fa0d648c7c5022ad8c2b6d4d98284a

editor/libeditor/html/nsHTMLEditRules.cpp

@@ -2408,6 +2408,7 @@ nsHTMLEditRules::WillDeleteSelection(nsISelection *aSelection,
       {
         // deleting across blocks
         // are the blocks of same type?
+        NS_ENSURE_STATE(leftParent && rightParent);
         
         // are the blocks siblings?
         nsCOMPtr<nsIDOMNode> leftBlockParent;