minor fixes for picking renderer in core profile

RenderPickingPlugin.cc

@@ -160,7 +160,10 @@ void RenderPickingPlugin::render(ACG::GLState* _glState, Viewer::ViewerPropertie
 
   //store and restore blend state ... no idea if this is actually necessary
   bool blendState = _glState->blending();
-  ACG::GLState::disable(GL_LIGHTING);
+  if(_glState->compatibilityProfile())
+  {
+    ACG::GLState::disable(GL_LIGHTING);
+  }
   ACG::GLState::enable(GL_BLEND);
   glClear(GL_DEPTH_BUFFER_BIT);
 
@@ -169,7 +172,10 @@ void RenderPickingPlugin::render(ACG::GLState* _glState, Viewer::ViewerPropertie
   ACG::SceneGraph::PickAction action(*_glState, pickRendererMode_, _properties.drawMode());
   ACG::SceneGraph::traverse_multipass( PluginFunctions::getSceneGraphRootNode() , action,*_glState);
 
-  ACG::GLState::enable(GL_LIGHTING);
+  if(_glState->compatibilityProfile())
+  {
+    ACG::GLState::enable(GL_LIGHTING);
+  }
   if(!blendState)
       ACG::GLState::disable(GL_BLEND);