Hdrp/fix/cookie area light update (#828)

* Fixed area light cookie not used when a spot cookie is assigned

* Updated changelog

Co-authored-by: sebastienlagarde <[email protected]>

Author: Antoine Lelievre

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -662,6 +662,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fix inconsistencies with transparent motion vectors and opaque by allowing camera only transparent motion vectors.
 - Fix reflection probe frame settings override
 - Fixed certain shadow bias artifacts present in volumetric lighting (case 1231885).
+- Fixed area light cookie not updated when switch the light type from a spot that had a cookie.
 
 ### Changed
 - Improve MIP selection for decals on Transparents

com.unity.render-pipelines.high-definition/Runtime/Lighting/LightLoop/LightLoop.cs

@@ -1486,7 +1486,8 @@ internal void GetLightData(CommandBuffer cmd, HDCamera hdCamera, HDShadowSetting
             lightData.screenSpaceShadowIndex = (int)LightDefinitions.s_InvalidScreenSpaceShadow;
             lightData.isRayTracedContactShadow = 0.0f;
 
-            if (lightComponent != null && lightComponent.cookie != null)
+            // lightComponent.cookie can't be used for area lights
+            if (lightComponent != null && lightComponent.cookie != null && lightType != HDLightType.Area)
             {
                 switch (lightType)
                 {