ASoC: wm8994: Fix sparse warning due to use of 0 as NULL

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index d2db63022607..98e462cbec73 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -792,7 +792,7 @@ static void vmid_reference(struct snd_soc_codec *codec)
 
                 switch (wm8994->vmid_mode) {
                 default:
-                        WARN_ON(0 == "Invalid VMID mode");
+                        WARN_ON(NULL == "Invalid VMID mode");
                 case WM8994_VMID_NORMAL:
                         /* Startup bias, VMID ramp & buffer */
                         snd_soc_update_bits(codec, WM8994_ANTIPOP_2,