Bug 773665 - Don't crash during shutdown because XPCOM is already mostly-dead and refuses to create a local file, r=ted

--HG--
extra : rebase_source : 238d7a8eec192fbddfbfeb384eb62b68db42dd69

toolkit/crashreporter/nsExceptionHandler.cpp

@@ -1707,6 +1707,10 @@ GetPendingDir(nsIFile** dir)
   }
 
   nsCOMPtr<nsIFile> pending = do_CreateInstance(NS_LOCAL_FILE_CONTRACTID);
+  if (!pending) {
+    NS_WARNING("Can't set up pending directory during shutdown.");
+    return false;
+  }
 #ifdef XP_WIN
   pending->InitWithPath(nsDependentString(pendingDirectory));
 #else