Fixed compilation error under Windows
Fixed compilation error under Windows

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