Fix Enum issue.

Added System.Enum.GetName(typeof(BlendModesEnum), m_BlendMode);

MaterialGraphProject/Assets/Rinaldo/BlendModeNode.cs

         
         protected override string GetFunctionName()
         {
-            return "unity_blendmode_" + precision;
+            return "unity_blendmode_" + System.Enum.GetName(typeof(BlendModesEnum), m_BlendMode);
         }
         protected override string GetInputSlot1Name()
         {