Prevent crashes when logging to syslog
Prevent crashes when logging to syslog

If a va_list is passed to a function that uses va_arg(), then its value
is undefined after the return of that function. Use vsyslog() with a
copy of the va_list passed to vlog() to prevent crashes.

Fixes #167

Arkq/bluez-alsa,Arkq/bluez-alsa,Arkq/bluez-alsa