Follow up 4019fb4
- Wrong macro for itemdb_is_element, thx @exneval
- Incompatible type issue on UNT_BANDING. bugreport:8616 http://rathena.org/board/tracker/issue-8616-error-while-recompiling/
- Skill usage messages ot conf/msg_conf/map_msg.conf instead following official client fail message by clif_skill_fail() for each failure. (related with skill_require_db.txt)
--> "%s is required." (similar: 28 messages)
-->"[%s] Poison effect was applied to the weapon." (similar: 8 messages)
-->"Please equipped with a %s." (similar: 7 messages)

Signed-off-by: Cydh Ramdh <house.bad@gmail.com>