reset LIB64 variable to always build 32bit on Mac so can build on Snowleopard
reset LIB64 variable to always build 32bit on Mac so can build on Snowleopard

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