- Follow up to r16147: check the price in the shop file, instead of id->value_buy. Thanks EvilPuncker!

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@16154 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/map/npc.c

@@ -2109,7 +2109,7 @@ static const char* npc_parse_shop(char* w1, char* w2, char* w3, char* w4, const
 			else value = 0; // Cashshop doesn't have a "buy price" in the item_db
 		}
 
-		if( type == SHOP && id->value_buy == 0 )
+		if( type == SHOP && value == 0 )
 		{ // NPC selling items for free!
 			ShowWarning("npc_parse_shop: Item %s [%d] is being sold for FREE in file '%s', line '%d'.\n",
 				id->name, nameid, filepath, strline(buffer,start-buffer));