[HUBZERO][#3502][PLG_PROJECTS_FILES] fix to undefined variable notice
[HUBZERO][#3502][PLG_PROJECTS_FILES] fix to undefined variable notice

anthonyfuentes/hubzero-cms,zooley/hubzero-cms,zooley/hubzero-cms,zooley/hubzero-cms,zweidner/hubzero-cms,zweidner/hubzero-cms,anthonyfuentes/hubzero-cms,zweidner/hubzero-cms,anthonyfuentes/hubzero-cms,zooley/hubzero-cms,zweidner/hubzero-cms,anthonyfuentes/hubzero-cms