- renamed SKILLUNITTIMER_INVERVAL to SKILLUNITTIMER_INTERVAL
- Heat now depends on the interval settings rather than firewall_hits_on_undead
- if you want Heat to do more or less hits you can now change the interval value in the skill_unit_db.txt (official+default: 20ms)
- Icewall doesn't break anymore when the SKILLUNITTIMER_INTERVAL gets changed
git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@11526 54d463be-8e91-2dee-dedb-b68131a5f0ec