Fallback to the default root path, if we detect root_path is set to a relative path. This should also help with the case when the path is set to a windows path and we're on a unix platform.
Fallback to the default root path,
if we detect root_path is set to
a relative path. This should
also help with the case when the
path is set to a windows path
and we're on a unix platform.

prman-pixar/RenderManForBlender,adminradio/RenderManForBlender,prman-pixar/RenderManForBlender