GSK/GL: Relax check for GL 3.x+ legacy contexts
Hi,
From the commit message:
On Windows with nVidia drivers at least, when we create a legacy context via wglCreateContext(), we may still get a (W)GL 4.x context. Allow such contexts to also use GLSL version 130 instead of 110, so that things do continue to work.
With blessings, thank you!