If the empty string is passed to load_lib return a reference to the current executable rather than trying to load the library.  This allows for a form of static linking.  Patch based on suggestion from KOBAYASHI, Tomoyas.
If the empty string is passed to load_lib return a reference to the current executable rather than trying to load the library.  This allows for a form of static linking.  Patch based on suggestion from KOBAYASHI, Tomoyas.

git-svn-id: 98787b36aaefbae4b30fa755be920954cd25e1e4@1906 ae7d391e-3f74-4a2b-a0db-a8776840fd2a

polyml/polyml,polyml/polyml,dcjm/polyml,dcjm/polyml,mn200/polyml,dcjm/polyml,dcjm/polyml,mn200/polyml,mn200/polyml,polyml/polyml,mn200/polyml,polyml/polyml