ALSA: control: Avoid kernel warnings from tlv ioctl with numid 0

ALSA: control: Avoid kernel warnings from tlv ioctl with numid 0

Orabug: 23330534

commit c0bcdbdff3ff73a54161fca3cb8b6cdbd0bb8762 upstream.

When a TLV ioctl with numid zero is handled, the driver may spew a
kernel warning with a stack trace at each call.  The check was
intended obviously only for a kernel driver, but not for a user
interaction.  Let's fix it.

This was spotted by syzkaller fuzzer.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit efcf073d7fa1aa1fb2a8d3f3db373e1a5ecbc60a)

Signed-off-by: Dan Duval <dan.duval@oracle.com>