[Ohrrpgce] SVN: teeemcee/10625 "npc chases npc": if the dest npc is tag-disabled, stop

[subversion at HamsterRepublic.com]

teeemcee
2018-09-12 06:08:27 -0700 (Wed, 12 Sep 2018)
184
"npc chases npc": if the dest npc is tag-disabled, stop

This is for consistency with deleted NPCs, though other behaviours could make
sense too.
Also document what happens in plotdict
---
U   wip/docs/plotdict.xml
U   wip/game.bas