(ITEM_MAX): New, value 9999.

(give, deliver_it): Use it instead of 9990.
(load_comm_ship, load_comm_land, rese): Use it instead of 9999.
(thre): Use it instead of 10000.
(check_market, explore, move, pln_dropoff): Use it instead of 32767.
(unload_it): Use it instead of 99999 (which couldn't possibly work,
but what do you expect from the autonav code).

src/lib/commands/move.c

@@ -308,8 +308,8 @@ move(void)
     }
 
     amt_dst = sect.sct_item[vtype];
-    if (32767 - amt_dst < amount) {
-	amount = 32767 - amt_dst;
+    if (amount > ITEM_MAX - amt_dst) {
+	amount = ITEM_MAX - amt_dst;
 	pr("Only room for %d, the rest were lost.\n", amount);
     }
     if (istest)