ALSA: timer: Fix leak in events via snd_timer_user_tinterrupt

The stack object “r1” has a total size of 32 bytes. Its field
“event” and “val” both contain 4 bytes padding. These 8 bytes
padding bytes are sent to user without being initialized.

Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
static int snd_timer_s_close(struct snd_timer *timer)
{
	struct snd_timer_system_private *priv;

	priv = (struct snd_timer_system_private *)timer->private_data;
	del_timer_sync(&priv->tlist);
	return 0;
}

static int snd_timer_s_close(struct snd_timer *timer)
{
	struct snd_timer_system_private *priv;

	priv = (struct snd_timer_system_private *)timer->private_data;
	del_timer_sync(&priv->tlist);
	return 0;
}
