Fixed 'ComputeShadowCoord' function to return correct screen-space coords

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/LightweightPassLit.hlsl

     half3 vertexLight = VertexLighting(o.posWS, o.normal);
     half fogFactor = ComputeFogFactor(o.clipPos.z);
     o.fogFactorAndVertexLight = half4(fogFactor, vertexLight);
-    o.shadowCoord = ComputeScreenPos(o.clipPos);
+    o.shadowCoord = ComputeShadowCoord(o.clipPos);
 
     return o;
 }

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/Shadows.hlsl

 
 inline half SampleScreenSpaceShadowMap(float4 shadowCoord)
 {
-    shadowCoord.xy = shadowCoord.xy / shadowCoord.w;
+    shadowCoord.xy /= shadowCoord.w;
     half attenuation = SAMPLE_TEXTURE2D(_ScreenSpaceShadowMap, sampler_ScreenSpaceShadowMap, shadowCoord.xy).x;
 
     // Apply shadow strength
 inline real SampleShadowmap(float4 shadowCoord)
 {
-    shadowCoord.xyz = shadowCoord.xyz /= shadowCoord.w;
+    shadowCoord.xyz /= shadowCoord.w;
 
     real attenuation;
 
     return 4 - dot(weights, half4(4, 3, 2, 1));
 }
 
-float4 ComputeShadowCoord(float3 positionWS)
+float4 ComputeScreenSpaceShadowCoords(float3 positionWS)
-#ifdef _SHADOWS_CASCADE
+    #ifdef _SHADOWS_CASCADE
+#else
+    return mul(_WorldToShadow[0], float4(positionWS, 1.0));
+}
-    return mul(_WorldToShadow[0], float4(positionWS, 1.0));
+float4 ComputeShadowCoord(float4 clipPos)
+{
+    return ComputeScreenPos(clipPos);
 }
 
 half RealtimeShadowAttenuation(float4 shadowCoord)

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightScreenSpaceShadows.shader

             float3 wpos = mul(unity_CameraToWorld, float4(vpos, 1)).xyz;
             
             //Fetch shadow coordinates for cascade.
-            float4 coords  = ComputeShadowCoord(wpos);
+            float4 coords  = ComputeScreenSpaceShadowCoords(wpos);
 
             return SampleShadowmap(coords);
         }