[Freeciv-Dev] (PR#8975) Bug: cm clear_cache() called before build_cache3()

["Benoit Hudson" <bh@xxxxxxxxxxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=8975 >

> [jdorje - Mon Jun 14 03:51:37 2004]:
> Well this is ugly.  It assumes that if MAX_FIELDS_USED is 0 then there 
> is at least 1 item in the list.  That is, 0 means the set of {0}, with 1 
> element in it.

If MAX_FIELDS_USED == 0, then you can *still* use the tile the city is built 
on.  That is, we 
need be able to represent using 0 workers.

Really, MAX_FIELDS_USED should not be a constant or constant-like thing, but 
part of 
tile_stats or cache3.

By the way, clear_cache should often be called before build_cache3, so that's 
not a bug.  It's a 
bug if we crash on it.