- Replaced item type literals with their appropriate constants. - Added itemdb_typename to replace the ugly "BUG!" filled array in @iteminfo (since r1741, follow up to r14550). - Made the item database parser verify item type for validity. - Added item type constants to const.txt for use in scripts (getiteminfo). git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@14551 54d463be-8e91-2dee-dedb-b68131a5f0ec