rfalke: Fix code which produces non-normal coordinat...

This is an automated notification of a change to freeciv cvs, 
on Fri Nov 30 03:39:22 PST 2001 = Fri Nov 30 11:39:22 2001 (GMT)
by Raimar Falke <rf13@xxxxxxxxxxxxxxxxxxxxxx>

---- Files affected:

freeciv/server mapgen.c

---- Log message:

Fix code which produces non-normal coordinates during the creation of
a random map position in a rectangle.

Reported by Jason Dorje Short <vze2zq63@xxxxxxxxxxx> as
(PR#1043). Patch by me.