API to follow the naming convention SWIG_<language>_<function>. This
should allow linking more than one interpreter into a program.
Unify the pointer-conversion runtime API.
[Python]: Add the function SWIG_MustGetPtr.
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@5246 626c5289-ae23-0410-ae9c-e8d60b6d4f22