OpenImageIO/oiio — pull request #399 by StefanStavrev (2012-07-12 08:44:01+00:00)
Title: Minor fixes for Over

Two fixes:

1. In imagebuf.h the const iterator
was taking non-const ImageBuf so I fixed that.

2. I moved the type checking code in ImageBufAlgo::over
at the top of the function, no need to come at the
end of the function to realize types are wrong.