codeintel: oop: actually skip scans of buffers we can't scan
http://bugs.activestate.com/show_bug.cgi?id=100213

(integrated from komodo (trunk) change 81743 by marky)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13578 b87d16e7-d29f-4ee1-b5ec-817d645d335f