Saturate dot product result in fresnel effect node to avoid negative values

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Nodes/Math/Vector/FresnelEffectNode.cs

             return
                 @"
 {
-    Out = pow((1.0 - dot (normalize (Normal), normalize (ViewDir))), Power);
+    Out = pow((1.0 - saturate(dot(normalize(Normal), normalize(ViewDir)))), Power);
 }
 ";
         }