K 10
svn:author
V 8
wsimpson
K 8
svn:date
V 27
2007-11-06T19:58:37.427722Z
K 7
svn:log
V 533
(PR#39830) 2.1.0 border expansion acquires destroyed city

Fix primary bug, apparently deliberate code that breaks upon border 
expansion, that had the truthful (unhelpful) comment:

  /* Use tile owner information not city owner information. */

Now, although the defunct city still appears inside the border, it 
won't appear in the player's list of cities.

Revise the dumb_city code, now uses struct vision_base.

Use city, unit, and tile accessor functions for *_owner (and others).

Add tile_special_type_iterate() in passing.

END