rv20 decoder

Originally committed as revision 2543 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/allcodecs.c

@@ -90,6 +90,7 @@ void avcodec_register_all(void)
     register_avcodec(&h263i_decoder);
     register_avcodec(&flv_decoder);
     register_avcodec(&rv10_decoder);
+    register_avcodec(&rv20_decoder);
     register_avcodec(&svq1_decoder);
     register_avcodec(&svq3_decoder);
     register_avcodec(&wmav1_decoder);