Memory protection violation fixed if number of found midi devices is greater than declared in MAX_MIDI_DEVICES.

[sq8mvy]

Memory protection violation fixed if number of found midi devices is greater than declared in MAX_MIDI_DEVICES. In the case of more subdevices midi (e.g. virmidi - virtual midi has 16 subdevices) on the list there were empty items in the absence of the subdevice name

[andreasdotorg]

Merged to andreasdotorg/linhpsdr. This would be better with an error message on overflow, or even dynamic memory allocation.