* lisp/mh-e/mh-e.el (mh-variant-gnu-mh-info, mh-variant-nmh-info): Run install-mh, not mhparam, to check whether an MH variant is installed on the system. mhparam fails if no user profile is found, so it is not a reliable check of the state of the system as a whole. Tested with: nmh 1.4, nmh 1.7.1, GNU Mailutils 2.2, GNU Mailutils 3.7, GNU Mailutils 3.13