Fix Proximity's handling of null angle updates, which was causing everything to add prox queries with zero min angles.
Fix Proximity's handling of null angle updates, which was causing everything to add prox queries with zero min angles.

sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata