Merge remote-tracking branch 'qatar/master'

* qatar/master:
  fft-test: Remove possibility of returning restricted exit code
  dct-test: Remove possibility of returning a restricted exit code
  base64-test: Remove posibility of returning restricted exit codes
  tree-test: Don't return restricted exit codes

Conflicts:
	libavutil/base64.c

See: b2fdf3fc
See: f80ca1cb
See: cbbd0ac7
See: 5dfdffebMerged-by: Michael Niedermayer <michaelni@gmx.at>