Re: [PATCH 0/1] MR9574: win32u/tests: Test GL_EXT_semaphore_win32.

[Rémi Bernon (＠rbernon)]

I realize that the `import_opengl_image` tests are missing them too but I think we should add `glGetError` checks after each call. Otherwise it's not testing much, and mostly that it doesn't crash (and you'll see that some calls are failing).