Fix Ticket # 347. Prevent crash when starting animation after changing mesh.
Fix Ticket # 347. Prevent crash when starting animation after changing mesh.

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