[CM] clm-3 help

[andersvi at extern.uio.no]

It works here in clm-3 if you substitute all the checks for the
various envelopes down in run with (env? envelope), ie.

                (if (or (env? degree-env) (env? distance-env))

instead of plain

                (if (or degree-env distance-env)


etc.

-anders