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_start(struct snd_timer * timer)
{
	struct snd_timer_system_private *priv;
	unsigned long njiff;

	priv = (struct snd_timer_system_private *) timer->private_data;
	njiff = (priv->last_jiffies = jiffies);
	if (priv->correction > timer->sticks - 1) {
		priv->correction -= timer->sticks - 1;
		njiff++;
	} else {
		njiff += timer->sticks - priv->correction;
		priv->correction = 0;
	}
	priv->last_expires = njiff;
	mod_timer(&priv->tlist, njiff);
	return 0;
}

static int snd_timer_s_start(struct snd_timer * timer)
{
	struct snd_timer_system_private *priv;
	unsigned long njiff;

	priv = (struct snd_timer_system_private *) timer->private_data;
	njiff = (priv->last_jiffies = jiffies);
	if (priv->correction > timer->sticks - 1) {
		priv->correction -= timer->sticks - 1;
		njiff++;
	} else {
		njiff += timer->sticks - priv->correction;
		priv->correction = 0;
	}
	priv->last_expires = njiff;
	mod_timer(&priv->tlist, njiff);
	return 0;
}
