Merge remote-tracking branch 'qatar/master'

* qatar/master:
  vc1: use an enum for Frame Coding Mode
  doc: cleanup filter section
  indeo3: error out if no motion vector is set.
  x86inc: Flag shufps as an floating-point instruction for the AVX emulation code.
  mpegaudio: do not use init_static_data() for initializing tables.
  musepack: fix signed shift overflow in mpc_read_packet()
  mov: Make format string match variable type.
  wmavoice: Make format string match variable type.
  vc1: select interlaced scan table by FCM element
  Generalize RIFF INFO tag support; support reading INFO tag in wav
  pthread: track thread existence in a separate variable.

Conflicts:
	doc/filters.texi
	libavcodec/pthread.c
	libavformat/avi.c
	libavformat/riff.c
	libavformat/riff.h
	libavformat/wav.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/indeo3.c

@@ -759,6 +759,8 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
                     av_log(avctx, AV_LOG_ERROR, "SkipCell procedure not implemented yet!\n");
 
                 CHECK_CELL
+                if(!curr_cell.mv_ptr)
+                    return AVERROR_INVALIDDATA;
                 copy_cell(ctx, plane, &curr_cell);
                 return 0;
             }