Changed method of specifying SimTK_DEFAULT_PRECISION to an integer (1,2, or 4) so that it is testable in a preprocessor expression.
Changed method of specifying SimTK_DEFAULT_PRECISION to an integer (1,2, or 4) so that it is testable in a preprocessor expression.

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