Fixed 0003824: private bug reports and bugnotes are sent out as notifications to everyone

core/email_api.php

• (email_collect_recipients): Check that all notified users have access level greater than private bug threshold for private bugs.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2556 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9