Fix #273660: MIDI Keyboard not responding when pressed before opening a score

[Jojo-Schmitz]

Seems needed for master too

[anatoly-os]

I don't understand the reason why @rtega changed this value to 1. There must be a reason or it was just changes for debugging. @rtega are you around? I would never remind code changes I did 4 years ago, but... Do you remember your 451909c and the reason why you used active=1? :)

[rtega]

Nope, not really. Looking at the code I guess that while playing with the code I first changed the active to 1 and then added the if on line 1789 which would prevent the active going below zero. I guess active could be zero.

[anatoly-os]

@rtega thank you for your notes.

[Jojo-Schmitz]

So this should make it into master too then, right?

[anatoly-os]

Yep, I'll merge manually

[Jojo-Schmitz]

it should git cherry-pick 0631528 cleanly

[lasconic]

Done.