Fix for bug 423473 (Cycle collector should restart after getting a fault). r/sr=jst.

--HG--
extra : rebase_source : fd82c02bef434c36383df0862af2399455caa65b

xpcom/base/nsCycleCollector.cpp

@@ -2280,6 +2280,8 @@ nsCycleCollector::Collect(PRUint32 aTryCollections)
         mWhiteNodes->Clear();
         ClearGraph();
 
+        mParams.mDoNothing = PR_FALSE;
+
         if (!collected)
             break;