ALSA: guard debugging code against NULL handles
ALSA: guard debugging code against NULL handles

GNOME/beast,swesterfeld/beast,GNOME/beast,swesterfeld/beast,swesterfeld/beast,tim-janik/beast,swesterfeld/beast,GNOME/beast,tim-janik/beast,swesterfeld/beast,GNOME/beast,swesterfeld/beast,tim-janik/beast,GNOME/beast,GNOME/beast,tim-janik/beast,GNOME/beast,swesterfeld/beast,tim-janik/beast,tim-janik/beast,tim-janik/beast