* spobjgetnext/init.c, spobjgetnext/spobjgetnext.scn: Add error cases for various null parameters.
* Makefile.am, configure.ac: Add initial test of _Objects_Get_next. * spobjgetnext/.cvsignore, spobjgetnext/Makefile.am, spobjgetnext/init.c, spobjgetnext/spobjgetnext.scn, spobjgetnext/system.h: New files.