- Added atcommand @exp
- Added error reporting when add_timer_interval receives a negative/0 interval value.
- Fixed a possible infinite recursion bug with splash self skills.
- Modified the way firewall_hits_on_undead works, to loop and invoke multiple skill_attacks based on the value.
git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@5338 54d463be-8e91-2dee-dedb-b68131a5f0ec