[Ohrrpgce] SVN: teeemcee/10926 Shops now autoquit when there's nothing to buy.

[subversion at HamsterRepublic.com]

teeemcee
2019-01-21 22:04:12 -0800 (Mon, 21 Jan 2019)
431
Shops now autoquit when there's nothing to buy.

This is the way they used to work before getting converted to slices. Nathan
complained that this was useful for creating menus where you pick one hero or
item which tag-disables all other options.
Note that if there's nothing in the shop, it doesn't even open.
However, unlike before, I made the quit happen only after the alert disappears.

Also, fix a RELOAD doc leak in buystuff
---
U   wip/game_udts.bi
U   wip/menustuf.rbas
U   wip/whatsnew.txt