fixed compile warning.

diff --git a/src/pcm/pcm_null.c b/src/pcm/pcm_null.c
index 4c85c9765c647de0cf51c646fef3fc55393473e5..338b58ae5d3c35a26e2ec88a1428d1ab822e38cf 100644 (file)
--- a/src/pcm/pcm_null.c
+++ b/src/pcm/pcm_null.c
@@ -432,7 +432,7 @@ pcm.name {
  *          changed in future.
  */
 int _snd_pcm_null_open(snd_pcm_t **pcmp, const char *name,
-                      snd_config_t *root, snd_config_t *conf, 
+                      snd_config_t *root ATTRIBUTE_UNUSED, snd_config_t *conf, 
                       snd_pcm_stream_t stream, int mode)
 {
        snd_config_iterator_t i, next;