OpenImageIO/oiio — pull request #675 by lgritz (2013-09-25 21:12:13+00:00)
Title: Fix ImageBufAlgo::colorconvert - no-op color transformations broken.

It incorrectly took an early out for NoOp color conversions, leaving
the destination image having undefined pixel values.

Bug fix suggested by Esteban Tovagliari, in #672, but reworked here to be a simpler change.