Fixed some avi with jpeg video.

modules/demux/avi/avi.c

@@ -1989,6 +1989,7 @@ static void AVI_ParseStreamHeader( vlc_fourcc_t i_id,
                 break;
             case AVITWOCC_dc:
             case AVITWOCC_db:
+            case AVITWOCC_AC:
                 SET_PTR( pi_type, VIDEO_ES );
                 break;
             default:

modules/demux/avi/libavi.h

@@ -295,6 +295,7 @@ void    AVI_ChunkFreeRoot( stream_t *, avi_chunk_t  *p_chk );
 #define AVITWOCC_db            VLC_TWOCC('d','b')
 #define AVITWOCC_dc            VLC_TWOCC('d','c')
 #define AVITWOCC_pc            VLC_TWOCC('p','c')
+#define AVITWOCC_AC            VLC_TWOCC('A','C')
     /* *** codex stuff ***  */
 
     /* Microsoft RLE video */