- fix assertion firing in plug-in layout tests

        * Plugins/WebBaseNetscapePluginView.m:
        (-[WebBaseNetscapePluginView restartNullEvents]):
        Don't start null events if the plug-in is not in the
        started state. This happens when the plug-in moves within
        its view hierarchy after it has been stopped.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@15277 268f45cc-cd09-0410-ab3c-d52691b4dbfc