Scripting and midi monophonic

[grego mondo]

Hello

I would like to change the script of "Midi Make Monophonic"

Actually it works like that :

when "note on" (msg 144) it send "note off" (msg 128) for the last note played (wether it was a note off or a note on)

I would like :

that it send a note off for the last note played ONLY if it was a note on.

Can somebody helps me ?

Thanks and good sunday