Since my English is still limited, I didn't understand the thing about cat's fires. Anyway, I assume you want to put a fire on and don't let the player to put it out. Ok, I don't think that the command can be removed, but we can make a script to check whether or not the fire is out, and if it is so, light it again:
#loop
? !(inflamed firename) : goto "lightit"
~0.05
goto "loop"
#lightit
firename inflame true
goto "loop"