output error message instead of assert().

assert() may cause an infinite loop in aplay, since it's in the
closing phase.

diff --git a/src/pcm/pcm_plug.c b/src/pcm/pcm_plug.c
index 1553af7..efed660 100644 (file)
--- a/src/pcm/pcm_plug.c
+++ b/src/pcm/pcm_plug.c
@@ -65,7 +65,10 @@ static int snd_pcm_plug_close(snd_pcm_t *pcm)
        int err, result = 0;
        if (plug->ttable)
                free(plug->ttable);
-       assert(plug->slave == plug->req_slave);
+       if (plug->slave != plug->req_slave) {
+               SNDERR("plug slaves mismatch");
+               return -EINVAL;
+       }
        if (plug->close_slave) {
                err = snd_pcm_close(plug->req_slave);
                if (err < 0)