fix tinderbox orange and thunderbird/firebird initial startup problem... r=dougt a=mkaply

xpcom/build/nsXPComInit.cpp

@@ -617,7 +617,7 @@ nsresult NS_COM NS_InitXPCOM2(nsIServiceManager* *result,
                                   nsnull,
                                   NS_XPCOM_STARTUP_OBSERVER_ID);
     
-    return rv;
+    return NS_OK;
 }