Styled light fixes

[TomArrow]

Thought these fixes related to styled lights might be interesting to you as well. Not making a PR since I don't have a build environment set up for GtkRadiant at all but they're pretty trivial to copy over.

https://github.com/Garux/netradiant-custom/pull/238

https://github.com/Garux/netradiant-custom/pull/243

At least for the second one, I also did a quick test with the q3map2 version from your Download section and it manifested the same problems.

In a nutshell, both issues have the same cause, accessing lightmap[lightmapNum] in the internal vertex storage which only stores the raw lightmap coordinates and thus only the [0] index in the array is defined and filled.