AMR-NB audio support patch by (<joca at rixmail dot se>)

Originally committed as revision 1876 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/allcodecs.c

@@ -108,6 +108,9 @@ void avcodec_register_all(void)
 #endif
 #endif /* CONFIG_DECODERS */
 
+#ifdef AMR_NB
+    register_avcodec(&amr_nb_decoder);
+#endif /* AMR_NB */
     /* pcm codecs */
 
 #define PCM_CODEC(id, name) \