alsa_write: Use NULL instead of 0.

This silences the following sparse warning:

	sparse: alsa_write.c:128:31: warning: Using plain integer as NULL pointer

diff --git a/alsa_write.c b/alsa_write.c
index 43b26868bef5abdf3d9268cc93f7b1ca8524693f..b0b21f2be4a6ac64c2d940f499b59757273db743 100644 (file)
--- a/alsa_write.c
+++ b/alsa_write.c
@@ -125,7 +125,7 @@ static int alsa_init(struct private_alsa_write_data *pad,
        period_time = pad->buffer_time * 250; /* buffer time / 4 */
        msg = "could not set period time";
        ret = snd_pcm_hw_params_set_period_time_near(pad->handle, hwparams,
-               &period_time, 0);
+               &period_time, NULL);
        if (ret < 0)
                goto fail;