Fix error on jack compilation with salsa

Fix error on jack compilation with salsa:
 /usr/include/alsa/ctl_macros.h:251:48: error: invalid conversion from
 'void*' to 'snd_ctl_elem_id_t* {aka snd_ctl_elem_id*}' [-fpermissive]

Signed-off-by: Takashi Iwai <tiwai@suse.de>
1 file changed