audio/pw: trace during init before calling pipewire API

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20230506163735.3481387-7-marcandre.lureau@redhat.com>

audio/pwaudio.c

@@ -784,10 +784,11 @@ static void *
 qpw_audio_init(Audiodev *dev)
 {
     g_autofree pwaudio *pw = g_new0(pwaudio, 1);
-    pw_init(NULL, NULL);
 
-    trace_pw_audio_init();
     assert(dev->driver == AUDIODEV_DRIVER_PIPEWIRE);
+    trace_pw_audio_init();
+
+    pw_init(NULL, NULL);
 
     pw->dev = dev;
     pw->thread_loop = pw_thread_loop_new("PipeWire thread loop", NULL);