Mike's changes to dsf.c alter the internal storage format of dsf

structures, meaning that ad-hoc initialisation now doesn't work.
Hence, this checkin converts all ad-hoc dsf initialisations into
calls to dsf_init() or snew_dsf(). At least, I _hope_ I've caught
all of them.

[originally from svn r6888]

map.c

@@ -1695,8 +1695,7 @@ static char *parse_edge_list(game_params *params, char **desc, int *map)
     int i, k, pos, state;
     char *p = *desc;
 
-    for (i = 0; i < wh; i++)
-	map[wh+i] = i;
+    dsf_init(map+wh, wh);
 
     pos = -1;
     state = 0;