ALSA: Fix initiailization of user-space controls

Fix an assertion when accessing a user-defined control due to lack of
initialization (appears only when CONFIG_SND_DEBUg is enabled).

  ALSA sound/core/control.c:660: BUG? (info->access == 0)
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

sound/core/control.c

@@ -954,6 +954,7 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
 	if (ue == NULL)
 		return -ENOMEM;
 	ue->info = *info;
+	ue->info.access = 0;
 	ue->elem_data = (char *)ue + sizeof(*ue);
 	ue->elem_data_size = private_size;
 	kctl.private_free = snd_ctl_elem_user_free;