minor change to build_bcc_list() but this function really needs rewriting: it's inefficient, strangely laid out, and currently seems to send email to developers on all changes not just new bugs!!

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1693 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9