Fixed a bug in the query tracing code that occurred when visiting pages that executed queries directly. e.g. proj_doc_page.php. This caused an 'undefined offset 1' error.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@4604 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9