Update TBGMailing.class.php

If the comment is owned by the current user and if that user has 'Notify me when I update or create an issue' off then continue (= don't send the email)

Fixes bug: http://issues.thebuggenie.com/thebuggenie/issues/2059
TBGEvent without a triggered

I stumbled on the following, don't know if it was intended but i thought it was rather strange to create a new event but never trigger it (that whey you would always get it's initial value returned)
Merge pull request #196 from Alexssssss/master

Update TBGMailing.class.php