snd_seq_ev_set_ump_data() stack smashing

alsa-project/alsa-lib issue #346 was opened from symdeb:

snd_seq_ev_set_ump_data(&umpev, buffer, len);

When called with len > 4 causes stack smashing. A ump messages is maximum four 32bit values. Proposal solution, return error when len > 4 ?

Issue URL : https://github.com/alsa-project/alsa-lib/issues/346 Repository URL: https://github.com/alsa-project/alsa-lib