[gtk/wip/chergert/glproto: 788/920] add missing bit about main()

[Christian Hergert <chergert src gnome org>]

commit 73e8726b56d02f6b7efd5a06042b7e7798c35fb9
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 27 21:43:45 2021 -0800

    add missing bit about main()

 gsk/next/TODO.md | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gsk/next/TODO.md b/gsk/next/TODO.md
index 3962e2136e..0e9ad92917 100644
--- a/gsk/next/TODO.md
+++ b/gsk/next/TODO.md
@@ -7,4 +7,5 @@
  * Add texture/framebuffer leak detector so we are certain things are working
  * Try to hold on to cached textures for more frames
  * Add debug tooling for sysprof so we can capture frame information
+ * OpenGL Shader transitions missing main()