Freetagging vocabularies not properly ignored, leading to access control problems

On our site, we use tac_lite for several vocabs and content_access for a content type. We use two single select and one freetagging vocab (that contains numeric values) for the content type controlled by content_access. Nodes that didn't use any tac_lite vocabs were mysteriously showing up with grants for tac_lite. I traced this back to the way that tac_lite handles freetagging vocabs. In _tac_lite_get_terms(), tac_lite decides if it handles the terms for a node by checking if the contents of $node->taxonomy are arrays, objects, or numeric. In the array check, freetagging vocabs are thrown away by checking for non-numeric array values. However, if you use numeric values in your freetagging vocab, this check fails and tac_lite tries to handle the term.

To fix this issue, I've checked for freetagging vocabs first, then only handled terms that definitely aren't from such vocabs. As far as I can tell, $node->taxonomy never contains objects, so I've removed this check, too.