Merge remote-tracking branch 'qatar/release/0.8' into release/0.10

* qatar/release/0.8: (23 commits)
  snow: Check mallocs at init
  vorbis: Validate that the floor 1 X values contain no duplicates.
  vorbisenc: check all allocations for failure
  indeo3: validate new frame size before resetting decoder
  lavfi: avfilter_merge_formats: handle case where inputs are same
  rv34: error out on size changes with frame threading
  rv34: Handle only complete frames in frame-mt.
  rv34: use AVERROR return values in ff_rv34_decode_frame()
  vlc/rl: Add ff_ prefix to the nonstatic symbols
  h263: Add ff_ prefix to nonstatic symbols
  alsdec: check opt_order.
  golomb: check remaining bits during unary decoding in get_ur_golomb_jpegls()
  lavf: don't segfault when a NULL filename is passed to avformat_open_input()
  mpegvideo: Don't use ff_mspel_motion() for vc1
  imgconvert: avoid undefined left shift in avcodec_find_best_pix_fmt
  eval: fix swapping of lt() and lte()
  nuv: check RTjpeg header for validity
  Revert "nuv: check per-frame header for validity."
  bmpdec: only initialize palette for pal8.
  sipr: fall back to setting mode based on bit_rate.
  ...

Conflicts:
	avconv.c
	libavcodec/dnxhddec.c
	libavcodec/golomb.h
	libavcodec/h263.h
	libavcodec/imgconvert.c
	libavcodec/mpegvideo_common.h
	libavcodec/mpegvideo_enc.c
	libavcodec/nuv.c
	libavcodec/rv34.c
	libavcodec/sipr.c
	libavcodec/vorbisdec.c
	libavcodec/vorbisenc.c

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

libavfilter/formats.c

@@ -49,6 +49,9 @@ AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
 
     if (a == b) return a;
 
+    if (a == b)
+        return a;
+
     ret = av_mallocz(sizeof(AVFilterFormats));
 
     /* merge list of formats */