Mesh does not work with P_Lines

[ScottFreeCode]

It appears that the Mesh type can be any variety of triangles or even points, but not a line list or line strip.

I wasn't sure at first if "mesh" only meant actual triangle surfaces, but the support for points makes me think that it should work for lines too.

[ScottFreeCode]

Also, be sure to include line loops in addition to line lists and line strips: https://www.khronos.org/opengl/wiki/Primitive#Line_primitives