OpenImageIO/oiio — pull request #410 by lgritz (2012-07-23 23:11:47+00:00)
Title: Review: Move mutex out of imagebuf definition

Change recent ImageBuf addition -- I don't like spin_mutex being in the public
definition of ImageBuf. Move the mutex to be static in imagebuf.cpp, not in
the header. That also eliminates the need for imagebuf.h to include thread.h.