Fixed compilation errors for no-define version of the LayeredLit shader.

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/LayeredLit/LayeredLitDefault.shader

 
     // Set of users variables
     PROP_DECL(float4, _BaseColor);
-
-    //PROP_DECL_TEX2D(_BaseColorMap);
-    TEXTURE2D(_BaseColorMap0);
-    TEXTURE2D(_BaseColorMap1);
-    TEXTURE2D(_BaseColorMap2);
-    TEXTURE2D(_BaseColorMap3);
-    SAMPLER2D(sampler_BaseColorMap0);
-
-
+    PROP_DECL_TEX2D(_BaseColorMap);
     PROP_DECL(float, _Metallic);
     PROP_DECL(float, _Smoothness);
     PROP_DECL_TEX2D(_MaskMap);

Assets/ScriptableRenderLoop/HDRenderLoop/Shaders/Material/Lit/LitData.hlsl

 {
     float3 result = float3(0.0, 0.0, 0.0);
 
-        result = rgb0 * weight[0] + rgb1 * weight[1];
+    result = rgb0 * weight[0] + rgb1 * weight[1];
 #if _LAYER_COUNT >= 3
     result += (rgb2 * weight[2]);
 #endif
     // calculate weight of each layers
     float left = 1.0f;
 
-    // ATTRIBUTE_UNROLL
+    [unroll]
     for (int i = _LAYER_COUNT - 1; i > 0; --i)
     {
         outWeights[i] = masks[i] * left;
 
 void GetSurfaceAndBuiltinData(FragInput input, out SurfaceData surfaceData, out BuiltinData builtinData)
 {
-    float4 maskValues = float4(1.0, 1.0, 1.0, 1.0);// input.vertexColor;
+    float4 maskValues = float4(1.0, 0.0, 0.0, 0.0);// input.vertexColor;
-        float4 maskMap = SAMPLE_TEXTURE2D(_LayerMaskMap, sampler_LayerMaskMap, input.texCoord0);
-        maskValues *= maskMap;
+    float4 maskMap = SAMPLE_TEXTURE2D(_LayerMaskMap, sampler_LayerMaskMap, input.texCoord0);
+    maskValues = maskMap;
 #endif
 
     float weights[_MAX_LAYER];