Merge remote-tracking branch 'qatar/release/0.5' into release/0.5
* qatar/release/0.5:
Bump version number for 0.5.6 release.
svq1dec: call avcodec_set_dimensions() after dimensions changed.
vmd: fix segfaults on corruped streams
vp6: partially propagate huffman tree building errors during coeff model parsing and fix misspelling
Plug some memory leaks in the VP6 decoder
vp6: Reset the internal state when aborting key frames header parsing
vp6: Fix illegal read.
vp6: Fix illegal read.
Fix out of bound reads in the QDM2 decoder.
Check for out of bound writes in the QDM2 decoder.
qdm2: check output buffer size before decoding
Fix qdm2 decoder packet handling to match the api
Conflicts:
libavcodec/qdm2.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
