server: Restart search from the start when releasing permanent objects at exit.

server/object.c

@@ -67,11 +67,21 @@ void dump_objects(void)
 
 void close_objects(void)
 {
-    struct object *obj, *obj2;
-
     /* release the permanent objects */
-    LIST_FOR_EACH_ENTRY_SAFE( obj, obj2, &object_list, struct object, obj_list )
-        if (obj->is_permanent) release_object( obj );
+    for (;;)
+    {
+        struct object *obj;
+        int found = 0;
+
+        LIST_FOR_EACH_ENTRY( obj, &object_list, struct object, obj_list )
+        {
+            if (!(found = obj->is_permanent)) continue;
+            obj->is_permanent = 0;
+            release_object( obj );
+            break;
+        }
+        if (!found) break;
+    }
 
     dump_objects();  /* dump any remaining objects */
 }