Fixes for PR

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Graphs/BooleanMaterialSlot.cs

             set { m_Value = value; }
         }
 
-        /*public override VisualElement InstantiateControl()
-        {
-            return new MultiFloatSlotControlView(owner, 1, () => new Vector4(value, 0f, 0f, 0f), (newValue) => value = newValue.x);
-        }*/
-
-            return value.ToString();
+            return (value ? 1 : 0).ToString();
         }
 
         public override void AddDefaultProperty(PropertyCollector properties, GenerationMode generationMode)

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Graphs/MaterialSlot.cs

                         || inputType == SlotValueType.Vector1
                         || inputType == SlotValueType.Dynamic;
                 case SlotValueType.Boolean:
-                    return inputType == SlotValueType.Vector1
-                        || inputType == SlotValueType.Boolean;
+                    return inputType == SlotValueType.Boolean;
             }
             return false;
         }