Use gcc function attribute `format' to catch bad format strings. Fix

them.  From Marc Olzheim.
Type modifier 'l' was missing in many places, probably rendering the
server useless on 64-bit hosts.
(ef_flush, ef_write, ef_extend, lwpCreate, lwpDestroy): Use conversion
specifier 'p' to print pointers.
(check_market): Fix display of loan amount.
(doland): Fix unescaped '%' (undefined behavior).
(ldump, ndump, pdump, sdump): Don't use flag '0' with conversion
specifier 's' (undefined behavior).
(dump, ldump, lost, ndump, pdump, sdump, empth_create, update_sched):
Cast time_t and pthread_t to long for printing.
(lwpStackCheck, lwpStackCheckUsed, finish_sects): Insert cast to fix
argument type on all platforms.
(prod): Remove extra argument.
(perform_mission, airdamage, retreat_land1, lwpReschedule): Format
string missed arguments.

src/lib/commands/nati.c

@@ -79,7 +79,7 @@ nati(void)
 	}
     }
     pr(" The treasury has $%.2f", (double)natp->nat_money);
-    pr("     Military reserves: %d\n", natp->nat_reserve);
+    pr("     Military reserves: %ld\n", natp->nat_reserve);
     pr("Education..........%6.2f       Happiness.......%6.2f\n",
        (double)natp->nat_level[NAT_ELEV],
        (double)natp->nat_level[NAT_HLEV]);