* test-suite/standalone/Makefile.am (test_cflags): Add `-I$(top_builddir)' so
that <config.h> can be found.
(snarfcppopts): Likewise.
* test-suite/standalone/*.c: Include <config.h>.
(scm_current_module): Return the root module if `the-module' fluid
gives #f.
* standalone/Makefile.am: Add stanza for test-with-guile-module.
* standalone/test-with-guile-module.c: New test.