Fix for crash when object frame goes away but stream is still going bug 99569 r=av sr=attinasi

git-svn-id: svn://10.0.0.236/trunk@104080 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/layout/generic/nsObjectFrame.cpp

@@ -3256,6 +3256,9 @@ nsPluginInstanceOwner::Destroy()
     else NS_ASSERTION(PR_FALSE, "plugin was not an event listener");
   }
   else NS_ASSERTION(PR_FALSE, "plugin had no content");
+
+  mOwner = nsnull; // break relationship between frame and plugin instance owner
+
   return NS_OK;
 }