Fixed a bug in custom mobilizers which prevented getMobilizerTransform() from being called by multiplyByHMatrix().
Fixed a bug in custom mobilizers which prevented getMobilizerTransform() from being called by multiplyByHMatrix().

Gjacquenot/simbody,robojukie/simbody,Gjacquenot/simbody,scamille/simbody,robojukie/simbody,elkingtonmcb/simbody,simbody/simbody,robojukie/simbody,scamille/simbody,elen4/simbody,chrisdembia/simbody,elen4/simbody,elkingtonmcb/simbody,chrisdembia/simbody,scamille/simbody,elkingtonmcb/simbody,chrisdembia/simbody,Gjacquenot/simbody,simbody/simbody