paaudio: do not move stream when sink/source name is specified

Unless we disable stream moving, pulseaudio can easily move the stream
on connect, effectively ignoring the source/sink specified by the user.
Signed-off-by: NKővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Message-id: c245929463e6e46a48b2875a150815e2ccba11b4.1566168923.git.DirtY.iCE.hu@gmail.com
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

audio/paaudio.c

@@ -517,6 +517,11 @@ static pa_stream *qpa_simple_new (
 #endif
         | PA_STREAM_AUTO_TIMING_UPDATE;
 
+    if (dev) {
+        /* don't move the stream if the user specified a sink/source */
+        flags |= PA_STREAM_DONT_MOVE;
+    }
+
     if (dir == PA_STREAM_PLAYBACK) {
         r = pa_stream_connect_playback(stream, dev, attr, flags, NULL, NULL);
     } else {