Changed dummy item id (#4625)

Fixes #4616

db/re/item_db.txt

@@ -5,6 +5,7 @@
 //
 // Healing Items
 //=============================================================
+500,Choko_Gangjeong,Choko Gangjeong,0,0,,10,,,,,0xFFFFFFFF,63,2,,,,,,{ percentheal 10,10; },{},{}
 501,Red_Potion,Red Potion,0,10,,70,,,,,0xFFFFFFFF,63,2,,,,,,{ itemheal rand(45,65),0; },{},{}
 502,Orange_Potion,Orange Potion,0,50,,100,,,,,0xFFFFFFFF,63,2,,,,,,{ itemheal rand(105,145),0; },{},{}
 503,Yellow_Potion,Yellow Potion,0,180,,130,,,,,0xFFFFFFFF,63,2,,,,,,{ itemheal rand(175,235),0; },{},{}

sql-files/item_db_re.sql

@@ -37,6 +37,7 @@ CREATE TABLE `item_db_re` (
 #
 # Healing Items
 #=============================================================
+REPLACE INTO `item_db_re` VALUES (500,'Choko_Gangjeong','Choko Gangjeong',0,0,NULL,10,NULL,NULL,NULL,NULL,0xFFFFFFFF,63,2,NULL,NULL,NULL,NULL,NULL,'percentheal 10,10;',NULL,NULL);
 REPLACE INTO `item_db_re` VALUES (501,'Red_Potion','Red Potion',0,10,NULL,70,NULL,NULL,NULL,NULL,0xFFFFFFFF,63,2,NULL,NULL,NULL,NULL,NULL,'itemheal rand(45,65),0;',NULL,NULL);
 REPLACE INTO `item_db_re` VALUES (502,'Orange_Potion','Orange Potion',0,50,NULL,100,NULL,NULL,NULL,NULL,0xFFFFFFFF,63,2,NULL,NULL,NULL,NULL,NULL,'itemheal rand(105,145),0;',NULL,NULL);
 REPLACE INTO `item_db_re` VALUES (503,'Yellow_Potion','Yellow Potion',0,180,NULL,130,NULL,NULL,NULL,NULL,0xFFFFFFFF,63,2,NULL,NULL,NULL,NULL,NULL,'itemheal rand(175,235),0;',NULL,NULL);

src/map/itemdb.cpp

@@ -439,7 +439,7 @@ static void itemdb_create_dummy(void) {
 	CREATE(dummy_item, struct item_data, 1);
 
 	memset(dummy_item, 0, sizeof(struct item_data));
-	dummy_item->nameid = 500;
+	dummy_item->nameid = ITEMID_DUMMY;
 	dummy_item->weight = 1;
 	dummy_item->value_sell = 1;
 	dummy_item->type = IT_ETC; //Etc item

src/map/itemdb.hpp

@@ -33,6 +33,7 @@
 ///Enum of item id (for hardcoded purpose)
 enum item_itemid
 {
+	ITEMID_DUMMY						= 499,
 	ITEMID_RED_POTION					= 501,
 	ITEMID_YELLOW_POTION				= 503,
 	ITEMID_WHITE_POTION					= 504,