Merge pull request #1146 from Unity-Technologies/fix-1145

Fix for issue 1145 and also fix standalone builds

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/Light/HDAdditionalLightData.cs

             {
                 lightData.lightTypeExtent = LightTypeExtent.Rectangle;
                 light.type = LightType.Point; // Same as in HDLightEditor
+#if UNITY_EDITOR
+#endif
             }
 
             // At first init we need to initialize correctly the default value

ScriptableRenderPipeline/HDRenderPipeline/HDRP/RenderPipelineResources/BufferPyramid.cs

 
         public void CreateBuffers()
         {
-            m_ColorPyramidBuffer = RTHandle.Alloc(size => CalculatePyramidSize(size), filterMode: FilterMode.Trilinear, colorFormat: RenderTextureFormat.ARGBHalf, sRGB: false, useMipMap: true, autoGenerateMips: false, name: "ColorPymarid");
+            m_ColorPyramidBuffer = RTHandle.Alloc(size => CalculatePyramidSize(size), filterMode: FilterMode.Trilinear, colorFormat: RenderTextureFormat.ARGBHalf, sRGB: false, useMipMap: true, autoGenerateMips: false, enableRandomWrite: true, name: "ColorPyramid");
             m_DepthPyramidBuffer = RTHandle.Alloc(size => CalculatePyramidSize(size), filterMode: FilterMode.Trilinear, colorFormat: RenderTextureFormat.RGFloat, sRGB: false, useMipMap: true, autoGenerateMips: false, enableRandomWrite: true, name: "DepthPyramid"); // Need randomReadWrite because we downsample the first mip with a compute shader.
         }