[Ohrrpgce] SVN: teeemcee/7941 spriteedit: add ss.max_spriteset member instead of passing 'sets' around

[subversion at HamsterRepublic.com]

teeemcee
2016-04-09 06:28:38 -0700 (Sat, 09 Apr 2016)
214
spriteedit: add ss.max_spriteset member instead of passing 'sets' around.

This is actually a pointer to a byref argument, but I continue to use 'sets'
where it's in scope for convenience. Hope that's not confusing
---
U   wip/custom_udts.bi
U   wip/drawing.bas