Fixed some errors in the saved query enhancement

M query_delete.php

• Removed an unneeded call to print_header_redirect() which causes a "headers already sent" error.

M query_view_page.php

• Another "headers already sent" error.

M admin/upgrade_inc.php

• ob_end_flush() call with no active buffer notce. I @silenced the notice.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2450 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9