* deathindicator: Fixes #1951 * worldpoint: if chunkX|Y >= 13, null. Fixes #1667 Fixes #1949 Fixes #1981 * maxhit: null check autocast. Fixes #1977 * metronome: ensure tock is > 0 Fixes: #1973 * clanchat: check if clan is null Fixes #1959 * entityhider: null check values. Fixes #1966 * slayer: null check task Fixes #1974 * chatfilter: Use concurrent list. Fixes #1982 * vorkath: null check vorkath Fixes #1983