[PD-dev] MIDI problems on linux

[Miller Puckette]

I'm having trouble getting "oss MIDI" (that is, access to /dev/midi*) 
working in linux. Whereas in 0.53 I get choices "none", "/dev/midi3", 
"/dev/midi4", "/dev/midi5", on 0.54 I get an extra entry, "(no 
device)".  When I select "midi4" for example, the next time I open the 
dialog it shows "midi3".  I think too that it' actually trying to open 
midi3, not midi4.

Commits that might be of interest are 
a0b74340313d26a430c145a421c7e5660b38d1cd (fixed off-by-one errors in 
MIDI-dialog) and dfaba7072c0bdae2e97a94f91f0e0a11f97f6687 (handle 
non-existing selection when showing midi devices) -- although these are 
dated 2021 I appear to have only merged them for 0.54. I don't know how 
to figure out what PR they came from.

Meanwhile one minor thing: when selecting "alsa midi" dialog the number 
of devices comes up 0 and 0, even if I had set them to 2 and 2 in the 
command line ("-alsamidi -mididev 1,2") - this is minor except that Pd 
unhelpfully closes the existing MIDI devices when the dialog is started.

I'm scared to try to fix these as I'm sure I'll break something else if 
i do :)

thanks

Miller