Bug fix in prtSetupMex for building libsvm.
Bug fix in prtSetupMex for building libsvm.

covartech/PRT,jpalves/PRT,covartech/PRT,jpalves/PRT,jpalves/PRT,jpalves/PRT,covartech/PRT,covartech/PRT,jpalves/PRT,covartech/PRT,covartech/PRT,jpalves/PRT