fix for 0005476: [Access Level Problem] Can see all docs

• only docs from projects where user meets access threshold are shown

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@3595 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9