Major brown paper bag fix
Major brown paper bag fix

Filter was set to empty dict while it was passed in as a possibly
empty param.

Patch by: Sverre Rabbelier

--HG--
extra : convert_revision : svn%3A32761e7d-7263-4528-b7be-7235b26367ec/trunk%402997

rhyolight/nupic.son,rhyolight/nupic.son,rhyolight/nupic.son