Fixes problem with animation mysteriously freezing after ~1 second when viewed in Firefox v31.0.
Fixes problem with animation mysteriously freezing after ~1 second when viewed in Firefox v31.0.

simbody/simbody,Gjacquenot/simbody,robojukie/simbody,elkingtonmcb/simbody,elkingtonmcb/simbody,chrisdembia/simbody,robojukie/simbody,scamille/simbody,chrisdembia/simbody,Gjacquenot/simbody,scamille/simbody,robojukie/simbody,simbody/simbody,scamille/simbody,chrisdembia/simbody,elkingtonmcb/simbody,Gjacquenot/simbody