ImGui_ImplOpenGL3_RenderDrawData() GL state

[BrunoLevy]

Version/Branch of Dear ImGui:

Version: 1.89.4

Back-end/Renderer/Compiler/OS

Back-ends: imgui_impl_opengl3.cpp

My Issue/Question:

If there was no previously bound GL program, ImGui_ImplOpenGL3_RenderDrawData() exits with a bound program.
This is due to the fix for #6220). In imgui_impl_opengl3.cpp, line 593:

if (glIsProgram(last_program)) glUseProgram(last_program);

maybe should be replaced with:

if (last_program == 0 || glIsProgram(last_program)) glUseProgram(last_program);

[ocornut]

Pushed fix as 7dcf129, thank you!