Refs #2557

Backports fix to -fixes.

Avoids segfault in mythmusic when files of different types (decoders) are used in a playlist.



git-svn-id: http://svn.mythtv.org/svn/branches/release-0-20-fixes@13307 7dbf422c-18fa-0310-86e9-fd20926502f2

mythplugins/mythmusic/mythmusic/playbackbox.cpp

@@ -1093,9 +1093,12 @@ void PlaybackBoxMusic::play()
         input = new QFile(playfile);
 
     if (decoder && !decoder->factory()->supports(sourcename))
+    {
+        decoder->removeListener(this);
         decoder = 0;
+    }
 
-    if (!decoder) 
+    if (!decoder)
     {
         decoder = Decoder::create(sourcename, input, output);