mcd, fix crash when unloading cd while playing audio

diff --git a/pico/cd/cdd.c b/pico/cd/cdd.c
index fd78c35..00e12ba 100644 (file)
--- a/pico/cd/cdd.c
+++ b/pico/cd/cdd.c
@@ -444,6 +444,9 @@ int cdd_unload(void)
   {
     int i;
 
+    /* stop audio streaming */
+    Pico_mcd->cdda_stream = NULL;
+
     /* close CD tracks */
     if (cdd.toc.tracks[0].fd)
     {