Redmine

Consider a case where issue 5 exists in the issue database already and
is already marked closed. If you have a "closes" statement in your
changelog that references a bug that's already closed, no linkage will
be applied because of this:

next if issue.status.is_closed?

This patch moves the code that updates referenced_issues above that
test, so that it still will avoid a duplicate attempt to close the
issue, but nonetheless will add the reference to the issue.