drawbox: Respect thickness parameter

The drawbox video filter is drawing lines one pixel thinner than
requested. The default thickness is 4 pixel but in fact the lines
drawn by default are only 3 pixel wide.

Change the comparisons in the code to fix this off-by-one bug. Also
change the default thickness from 4 to 3 to minimize the unexpected
changes from the user's perspective.

As I was already touching these lines, I also removed the "maximum" in
the thickness parameter description, as I don't think it was adding
any value and I even found it confusing.

Reviewed-by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
doc/general: Make the license status of the Android libraries clearer

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
lavfi/spp: fix description.
vc1_parser: fix parsing of the frame headers in interlaced streams

first_pic_header_flag needs to be set to allow the parsing code to change
some stream parameters, and not error out.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
mpegts: Enable muxing of SMPTE KLV metadata

Muxer code rebased/split out by: Jeff Blackburne <jblackburne@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec_encode_audio2: fix memleak on last padded frame

Regression introduced by 799f57ac96f9891d1a0f7d6c4b218ed536e8aca5

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
apetag: do not require seekable output

Also don't write empty tags.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
avcodec/jpeg2000dec: Check Psot

Fixes out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/jpeg2000dec: check len before parsing header

Fixes out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/g2meet: Check monochrome cursor width

Fixes out of array write

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge branch 'master' into wavpack-working