Crashes

[1cewulf]

Crashes game since update.
AsyncErr: Lua: Runtime error from mod 'water_life' in callback luaentity_Step(): /home/sam/.minetest/mods/mobkit/init.lua:426: attempt to compare number with nil
stack traceback:
/home/sam/.minetest/mods/mobkit/init.lua:426: in function 'is_alive'
/home/sam/.minetest/mods/water_life/animals/coralfish.lua:5: in function 'logic'
/home/sam/.minetest/mods/mobkit/init.lua:848: in function </home/sam/.minetest/mods/mobkit/init.lua:826>