Use db_rewrite_sql to filter content

Hello,

I've noticed, that module do not use db_rewrite_sql function when fetching number of nodes for categories. So I could get empty categories in list even if I've turned off showing empty categories (and of course, it show wrong count of nodes). The problem lies in the function term_has_nodes(); Here is quick fix:

Instead (taxonomyblocks.module: #782)

  $nid = db_result(db_query("SELECT tn.nid FROM {term_node} tn, {node} n WHERE tn.tid = %d AND n.nid = tn.nid AND n.status = 1 ", $tid));

Place:

  $nid = db_result(db_query(db_rewrite_sql("SELECT n.nid FROM  {term_node} tn, {node} n WHERE tn.tid = %d AND n.nid = tn.nid AND n.status = 1"), $tid));

Unified patch attached. Didn't checked other queries yet, but I suspect there will be similar problems with fetching taxonomies terms (my project not using filtering by TID, just NID, so I can't check it)