ffi/ffi-compiler — pull request #4 by frahugo (2013-04-13 20:38:41+00:00)
Title: On windows, the start path for library loading is set to '.'

The path in caller[0] includes the drive letter followed by :, which is the separator
we use to split the path. i.e. c:/foo/bar/file.rb.

I added a small method with logic specific to Windows