Thanks to a patch from Ondrej Jombik nepto@pobox.sk from ages ago. Most of his patch had been fixed elsewhere by the time I got to it but this part was missed.

• proj_doc_add.php: correct a variable reference so database uploads work

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1809 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9