Make mdh property public readable (not ideal)

MEX file access this mdh property, rather than calling ismdh() method (slow, ugly)

Author: petercorke

@SerialLink/SerialLink.m

@@ -184,14 +184,13 @@
     end
 
     properties (SetAccess = private)
+        % needs to be public readable for access by MEX file
         n
         links
         T
-    end
-    
-    properties (Access = private)
         mdh
     end
+    
 
     properties (Dependent = true, SetAccess = private)
         config

mex/frne.c

@@ -254,13 +254,11 @@ mexFunction(
     /*
      * rotate gravity if base transform is set
      */
-    //robot.dhtype = mstruct_getint(mx_robot, 0, "mdh");
-    {
-        mxArray *lhs[1];
-        mexCallMATLAB(1, lhs, 1, prhs, "ismdh");
-        robot.dhtype = (int) mxGetScalar(lhs[0]);
-        //mexPrintf("dhtype = %d\n", robot.dhtype);
-    }
+
+    /*
+     * get MDH flag
+     */
+    robot.dhtype = mstruct_getint(mx_robot, 0, "mdh");
 
     /* build link structure */
     robot.links = (Link *)mxCalloc((mwSize) njoints, (mwSize) sizeof(Link));