Merge branch 'hotFixGLErrorSettingBlendFunc' into 'master'

fixed glerror caused by materialnode passing bad values to blendfunc

See merge request !62

libs_required/ACG/Scenegraph/MaterialNode.cc

@@ -304,7 +304,7 @@ void MaterialNode::enter(GLState& _state, const DrawModes::DrawMode&  _drawmode
     if (material_.blending_)
     {
       _state.set_depthFunc(GL_LEQUAL);
-      ACG::GLState::blendFunc(material_.blendParam1_, material_.blendParam2_);
+      ACG::GLState::blendFunc(material_.blendingParam1(), material_.blendingParam2());
       ACG::GLState::enable(GL_BLEND);
     }
     else