Bugfix PreIntegratedFGD is now initialized even if there is no active camera on init.

Assets/ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs

         private void CopyDepthBufferIfNeeded(ScriptableRenderContext renderContext)
         {
             var cmd = new CommandBuffer() { name = NeedDepthBufferCopy() ? "Copy DepthBuffer" : "Set DepthBuffer"};
-            
+
             if (NeedDepthBufferCopy())
             {
                 using (new Utilities.ProfilingSample("Copy depth-stencil buffer", renderContext))
             // select the most main camera!
 
             Camera camera = cameras.OrderByDescending(x => x.tag == "MainCamera").FirstOrDefault();
-            if (camera == null)
-                return;
+            if (camera == null)
+            {
+                renderContext.Submit();
+                return;
+            }
-            if (!CullResults.GetCullingParameters(camera, out cullingParams))
-                return;
+            if (!CullResults.GetCullingParameters(camera, out cullingParams))
+            {
+                renderContext.Submit();
+                return;
+            }
 
             m_ShadowPass.UpdateCullingParameters(ref cullingParams);