Fix which is_regular is called in searchpath_find (thanks Thiago)
Fix which is_regular is called in searchpath_find (thanks Thiago)

OpenImageIO/oiio,lgritz/oiio,OpenImageIO/oiio,OpenImageIO/oiio,lgritz/oiio,lgritz/oiio,OpenImageIO/oiio,lgritz/oiio