fixed crash when packagename is null on accessibility event

git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@214 21922344-3934-ee51-d6e3-fd981ce84c01
support golocker with nilsplus events

git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@215 21922344-3934-ee51-d6e3-fd981ce84c01