x86: h264_idct: Remove incorrect comment
w32pthread: help compiler figure out undeeded code

The emulation code is not needed when targetting Vista+
This helps getting rid of CreateSemaphore symbol, which is
forbidden in Windows Store apps.

Signed-off-by: Martin Storsjö <martin@martin.st>
lavf/tee: initialize ret in parse_bsfs()

Fix spurious failures.
lavfi/gradfun: support gbrp

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Merge commit '0b45269c2d732d15afa2de9c475d85fcf5561ac4'

* commit '0b45269c2d732d15afa2de9c475d85fcf5561ac4':
  x86: h264_idct: Remove incorrect comment

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '4622f11f9c83db8a2e08408c71ff901826ca652c'

* commit '4622f11f9c83db8a2e08408c71ff901826ca652c':
  w32pthread: help compiler figure out undeeded code

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