This was a regression in r54223, and it's the most direct fix I can
think of. The problem seems to be that sys_Cmd_Remove_Scene_Anim()
clears the character's _animationInstance while character::playAnim()
is waiting "for the character to be ready".
My fix was to treat _animationInstance NULL as another sign that the
wait is over, but maybe the real fix is for sys_Cmd_Remove_Scene_Anim()
to do more than just clear the variable, e.g. stop the script or
something like that?
svn-id: r54549
6b8a3dba70