Index: common/city.c
===================================================================
RCS file: /home/freeciv/CVS/freeciv/common/city.c,v
retrieving revision 1.159
diff -u -r1.159 city.c
--- common/city.c	2002/05/28 22:39:10	1.159
+++ common/city.c	2002/06/06 20:52:05
@@ -1979,6 +1979,8 @@
 **************************************************************************/
 void generic_city_refresh(struct city *pcity)
 {
+  int prev_tile_trade = pcity->tile_trade;
+
   set_food_trade_shields(pcity);
   citizen_happy_size(pcity);
   set_tax_income(pcity);	/* calc base luxury, tax & bulbs */
@@ -1989,6 +1991,18 @@
   city_support(pcity);		/* manage settlers, and units */
   citizen_happy_wonders(pcity);	/* happy wonders & fundamentalism */
   unhappy_city_check(pcity);
+
+  if (pcity->tile_trade != prev_tile_trade) {
+    int i;
+
+    for (i = 0; i < NUM_TRADEROUTES; i++) {
+      struct city *pcity2 = find_city_by_id(pcity->trade[i]);
+
+      if (pcity2) {
+	generic_city_refresh(pcity2);
+      }
+    }
+  }
 }
 
 /**************************************************************************