Add missing expansion island

The number of islands was off by one.  The last island was
created, but not actually placed on the map.

src/util/fairland.c

@@ -832,7 +832,7 @@ grow_islands(void)
 	find_coast(c);
 	qprint(" %d(%d)", c - nc + 1, secs);
 	isecs[c] = secs;
-	ctot = c;
+	ctot++;
     }
 }