Merge branch 'fixPolylineCirclePickingGLCompat' into 'master'

fixes picking of polyline circles for compatibility profiles.

See merge request !85

libs_required/ACG/Scenegraph/GlutPrimitiveNode.cc

@@ -399,10 +399,10 @@ pick(GLState& _state , PickTarget _target)
       for (size_t i = 0; i < primitives_.size(); ++i)
       {
         _state.pick_set_name(i);
-        glPushMatrix();
-        glTranslatef(primitives_[i].position[0], primitives_[i].position[1], primitives_[i].position[2]);
+        _state.push_modelview_matrix();
+        _state.translate(primitives_[i].position[0], primitives_[i].position[1], primitives_[i].position[2]);
         draw_obj(_state, i);
-        glPopMatrix();
+        _state.pop_modelview_matrix();
       }
       break; 
     }