stereo3d: add missing include guards
Merge commit '440842c4eb1d7709654ec97cd687663d11ef499c'

* commit '440842c4eb1d7709654ec97cd687663d11ef499c':
  stereo3d: add missing include guards

Merged-by: Michael Niedermayer <michaelni@gmx.at>
tests/fate.sh: report different status for different errors

The order of error codes will be useful in my future fateserver patches.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>