Fix: Add null checks for Overlay.Animator in GraphicsSingleton.OnRender

[prjanitor]

Problem

In GraphicsSingleton.OnRender, the code iterates through Session.Overlays.Values and directly accesses overlay.Animator without verifying that the Overlay object or its Animator property is non-null. This causes a NullReferenceException at runtime if:

1. An Overlay is added to the dictionary with a null Animator
2. The Animator property is null due to initialization failure

Solution

Added null checks at the beginning of both foreach loops in the OnRender method:

if (overlay == null || overlay.Animator == null) continue;

This safely skips any overlay that is null or has a null animator, preventing the exception while maintaining the rendering pipeline's functionality for valid overlays.

Files Changed

• OpenVROverlayPipe/GraphicsSingleton.cs - Added null checks in two foreach loops within OnRender method

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