OpenImageIO/oiio — pull request #348 by sambler (2012-04-27 08:48:50+00:00)
Title: Small patch to allow compiling on systems without log2

When creating the freebsd port for oiio I found I needed to add log2 functions to two files for freebsd 8.2 and earlier. Rather than make it freebsd specific I opted to check for log2 being defined so it can be more universal.