[PATCH] fix snd_pcm_drain() excluding SETUP state from valid states

[sylvain.bertrand at gmail.com]

once draining is done, the pcm enters the SETUP state, which ought to
be valid for snd_pcm_drain()

signed-off-by: Sylvain BERTRAND <sylvain.bertrand at legeek.net>
---

I missed this one in my previous patch because exiting with or without
an error once draining is done was producing the same result.

--- a/src/pcm/pcm.c
+++ b/src/pcm/pcm.c
@@ -1329,7 +1329,7 @@ int snd_pcm_drain(snd_pcm_t *pcm)
 		SNDMSG("PCM not set up");
 		return -EIO;
 	}
-	err = bad_pcm_state(pcm, P_STATE_RUNNABLE);
+	err = bad_pcm_state(pcm, P_STATE_RUNNABLE | P_STATE(SETUP));
 	if (err < 0)
 		return err;
 	/* lock handled in the callback */