sugar function for getting XYZ

Author: dcorboy

uarm_library.h

@@ -102,6 +102,7 @@ class uArmClass
 	    double getCalX() {calXYZ(); return g_cal_x;}
 	    double getCalY() {calXYZ(); return g_cal_y;}
 	    double getCalZ() {calXYZ(); return g_cal_z;}
+      void getCalXYZ(double& x, double& y, double &z) {calXYZ(); x = g_cal_x; y = g_cal_y; z = g_cal_z;}
 
 	    void calAngles(double x, double y, double z);