lisp-format, scheme-format: Fix a memory overrun.
* gettext-tools/src/format-lisp.c (make_repeated_list): Fix upper bound of a
loop.
* gettext-tools/src/format-scheme.c (make_repeated_list): Likewise.
* gettext-tools/tests/xgettext-lisp-4: New file.
* gettext-tools/tests/xgettext-scheme-6: New file.
* gettext-tools/tests/Makefile.am (TESTS): Add them.
