rfalke: Cleanup: replace "assert(is_real_tile(x,y));...

This is an automated notification of a change to freeciv cvs, 
on Sun Sep 30 14:55:32 PDT 2001 = Sun Sep 30 21:55:32 2001 (GMT)
by Raimar Falke <rf13@xxxxxxxxxxxxxxxxxxxxxx>

---- Files affected:

freeciv/client/gui-gtk mapview.c
freeciv/client/gui-mui mapclass.c
freeciv/client/gui-xaw mapview.c
freeciv/server mapgen.c

---- Log message:

Cleanup: replace "assert(is_real_tile(x,y));normalize_map_pos(&x,&y);"
with "is_real = normalize_map_pos(&x,&y);assert(is_real);".