Fix emacs-module.c for wide ints

Fix emacs-module.c for wide ints

* src/emacs-module.c (lisp_to_value): Compare the produced value
with the original Lisp object, not with the one potentially
converted into a Lisp_Cons.  Fixes assertion violations when
working with integers larger than fit into a 32-bit value.

* modules/mod-test/test.el (mod-test-sum-test): Add tests for
large integers, to test --with-wide-int.