Fix for XUL assertions when loading browser windows. sr=hyatt

content/xul/document/src/nsXULDocument.cpp

@@ -5810,11 +5810,10 @@ nsXULDocument::CheckBroadcasterHookup(nsXULDocument* aDocument,
         // Bail if there's no broadcasterID
         if ((rv != NS_CONTENT_ATTR_HAS_VALUE) || (broadcasterID.Length() == 0)) {
             // Try the command attribute next.
-            nsAutoString commandID;
-            rv = aElement->GetAttribute(kNameSpaceID_None, nsXULAtoms::command, commandID);
+            rv = aElement->GetAttribute(kNameSpaceID_None, nsXULAtoms::command, broadcasterID);
             if (NS_FAILED(rv)) return rv;
 
-            if (rv == NS_CONTENT_ATTR_HAS_VALUE && commandID.Length() > 0) {
+            if (rv == NS_CONTENT_ATTR_HAS_VALUE && broadcasterID.Length() > 0) {
               // We've got something in the command attribute.  We only treat this as
               // a normal broadcaster if we are not a menuitem or a key.
               nsCOMPtr<nsIAtom> tag;