A first pass in attempts to fix crashes when ACS causes map changes.
Frustratingly still got a crash, but I think this is definitely the right foundation to work with.
Returns bot status of activating player
ZDoom had a bot status function that could be mimiced... but it used a passed player number, when all we need to check for is the activator.
To this end, has a different name (the ZDoom version was "PlayerIsBot")
- ThingCount has an extra argument for sector tag.
- CountEnemies and CountPushables have an extra argument for thing tag.
- Sector tag 0 for CountEnemies and CountPushables now redirects to activator sector.
An immediate level change on command, to the specified level (via string).
Utilises the existing nextmapoverride and skipstats system, but with skipstats assumed to be the default.
Lines, sides, sectors, and things now all support the "Custom" tab properly. Label a property as `user_[whatever you want]` in this tab, and it will be added to the structure. ACS will then be able to retrieve it using the `Get[x]UserProperty()` function.
SetLineRenderStyle(int tag, int blend, int alpha)
Changes the blend mode and transparency of a linedef. Requires new compiler config for the blend mode constants.
