region ownership fixes

src/common/gamecode/economy.c

@@ -3211,7 +3211,7 @@ peasant_taxes(region * r)
   money = rmoney(r);
   if (money<=0) return;
 
-  b = largestbuilding(r, &is_tax_building, false);
+  b = largestbuilding(r, &is_owner_building, false);
   if (b==NULL) return;
 
   u = buildingowner(r, b);

src/common/gamecode/laws.c

@@ -1469,7 +1469,7 @@ display_cmd(unit * u, struct order * ord)
       cmistake(u, ord, 148, MSG_EVENT);
       break;
     }
-    if (b != largestbuilding(r, &is_tax_building, false)) {
+    if (b != largestbuilding(r, &is_owner_building, false)) {
       cmistake(u, ord, 147, MSG_EVENT);
       break;
     }
@@ -1712,7 +1712,7 @@ name_cmd(unit * u, struct order * ord)
       cmistake(u, ord, 148, MSG_EVENT);
       break;
     }
-    if (b != largestbuilding(r, &is_tax_building, false)) {
+    if (b != largestbuilding(r, &is_owner_building, false)) {
       cmistake(u, ord, 147, MSG_EVENT);
       break;
     }

src/common/kernel/eressea.c

@@ -2621,6 +2621,16 @@ is_castle(const struct building * b)
   return (b->type==bt_castle);
 }
 
+boolean is_owner_building(const struct building * b)
+{
+  region * r = b->region;
+  if (b->type->taxes && r->land && r->land->ownership) {
+    unit * u = buildingowner(r, b);
+    return u && u->faction == r->land->ownership->owner;
+  }
+  return false;
+}
+
 boolean is_tax_building(const building * b)
 {
   if (b->type->taxes) {

src/common/kernel/eressea.h

@@ -247,6 +247,7 @@ extern char * write_unitname(const struct unit * u, char * buffer, size_t size);
 struct building *largestbuilding(const struct region * r, boolean (*eval)(const struct building *), boolean imaginary);
 boolean is_castle(const struct building * b);
 boolean is_tax_building(const struct building * b);
+boolean is_owner_building(const struct building * b);
 extern int count_all(const struct faction * f);
 extern int count_migrants (const struct faction * f);
 extern int count_maxmigrants(const struct faction * f);

src/common/kernel/unit.c

@@ -834,11 +834,8 @@ can_leave(unit * u)
     rule_leave = get_param_int(global.parameters, "rules.move.owner_leave", 0);
   }
   if (rule_leave && u->building && u==buildingowner(u->region, u->building)) {
-    building * b = largestbuilding(u->region, &is_tax_building, false);
-    if (b==u->building) {
     return false;
   }
-  }
   return true;
 }