ALSA: lx6464es: Use NULL for pointers

Spotted by sparse:
  sound/pci/lx6464es/lx6464es.c:415:47: warning: Using plain integer as NULL pointer
  sound/pci/lx6464es/lx6464es.c:417:48: warning: Using plain integer as NULL pointer

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2015-05-26 12:56:21 +02:00
commit e42e748efd