As reported by deivy petrescu, applescript can pass in [NSNull null] as the title or description if the value is missing in the calling script.  We now protect against trying to use nil or non-NSString titles and descriptions when doing the notify command.
As reported by deivy petrescu, applescript can pass in [NSNull null] as the title or description if the value is missing in the calling script.  We now protect against trying to use nil or non-NSString titles and descriptions when doing the notify command.

--HG--
extra : convert_revision : svn%3A99687598-2e92-11dd-8019-fe7b9d601d1b/trunk%403634

incbee/Growl,PersonifyInc/growl,PersonifyInc/growl,incbee/Growl,incbee/Growl,PersonifyInc/growl,incbee/Growl,incbee/Growl,PersonifyInc/growl,PersonifyInc/growl