[PATCH] drm/amd/display: use NULL instead of using plain integer as pointer

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This fixes the following sparse warnings:
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_resource.c:1910:16: warning: Using
plain integer as NULL pointer

Signed-off-by: Haowen Bai <baihaowen@xxxxxxxxx>
---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 18757c1..99ccac3 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1907,7 +1907,7 @@ static struct audio *find_first_free_audio(
 			return pool->audios[i];
 		}
 	}
-	return 0;
+	return NULL;
 }
 
 /*
-- 
2.7.4




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