Fixed function pipeline program crash

[iProgramMC]

Bug Report

What's the issue you encountered?

OpenGX crashes in _ogx_shader_draw_done if no shaders are uploaded.

Here is the function that causes this issue:
https://github.com/devkitPro/opengx/blob/master/src/shader.c#L1092

There is no check for if the current_program is zero like in other places.

How can the issue be reproduced?

Never use OpenGL shader APIs.

Environment?

Using Windows 11, with the msys2 shell, but I don't think this matters.

Additional context?

If I disable this function things still don't work because the screen turns gray (probably some kind of misuse of the library?!), but I'm not talking about the gray screen issue.

[mardy]

Thanks, you are indeed correct! I'll fix it, but if you need help for the gray screen issue you'll have to provide some code snippets to reproduce the issue, so that I can look into it.