Minor fix for test_jointGMM.cpp
Minor fix for test_jointGMM.cpp

caseywang777/edda,caseywang777/edda,ChengLiOSU/edda,subhashis/edda,subhashis/edda,caseywang777/edda,GRAVITYLab/edda,ChengLiOSU/edda,ChengLiOSU/edda,subhashis/edda,caseywang777/edda,ChengLiOSU/edda,GRAVITYLab/edda,subhashis/edda,GRAVITYLab/edda,GRAVITYLab/edda,subhashis/edda,GRAVITYLab/edda,ChengLiOSU/edda,caseywang777/edda