Apply a patch to fix eye dome lighting in 5.6.0 parallel runs.

Corresponds to paraview/paraview!3124

projects/paraview.cmake

@@ -256,6 +256,8 @@ endif ()
 if (paraview_SOURCE_SELECTION STREQUAL "5.6.0")
   superbuild_apply_patch(paraview fix-catalyst-adapter-deps
     "Fix issue with catalyst adapters and dependency search")
+  superbuild_apply_patch(paraview fix-eye-dome-lighting
+    "Fix eye dome lighting in parallel")
 endif ()
 
 if (WIN32 AND las_enabled)

projects/patches/paraview-fix-eye-dome-lighting.patch

+diff --git a/ParaViewCore/VTKExtensions/Rendering/vtkIceTCompositePass.cxx b/ParaViewCore/VTKExtensions/Rendering/vtkIceTCompositePass.cxx
+index 636e0e8..8cd79f5 100644
+--- a/ParaViewCore/VTKExtensions/Rendering/vtkIceTCompositePass.cxx
++++ b/ParaViewCore/VTKExtensions/Rendering/vtkIceTCompositePass.cxx
+@@ -960,6 +960,7 @@ void vtkIceTCompositePass::PushIceTDepthBufferToScreen(const vtkRenderState* ren
+   ostate->vtkglColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+ 
+   GLboolean prevDepthTest = ostate->GetEnumState(GL_DEPTH_TEST);
++  ostate->vtkglEnable(GL_DEPTH_TEST);
+ 
+   GLboolean prevDepthMask;
+   ostate->vtkglGetBooleanv(GL_DEPTH_WRITEMASK, &prevDepthMask);