add support for PSO DC v1/v2

src/Items.cc

@@ -172,7 +172,9 @@ void player_use_item(shared_ptr<Client> c, size_t item_index) {
     }
   }
 
-  bool should_delete_item = true;
+  // TODO: It appears that on DC, using an item should NOT delete it from the
+  // player's inventory - the client will send a followup 6x29 to do that.
+  bool should_delete_item = (c->version() != GameVersion::DC);
 
   auto& item = c->game_data.player()->inventory.items[item_index];
   if (item.data.data1w[0] == 0x0203) { // technique disk