fix bug #1393, "sortm core dumps", using patch provided by Robert Elz, kre@munnari.oz.au.  The core dump occurred when "Subject:" was immediately followed by an alphanumeric, and "-textfield subject" were used as arguments.
fix bug #1393, "sortm core dumps", using patch provided by
Robert Elz, kre@munnari.oz.au.  The core dump occurred
when "Subject:" was immediately followed by an
alphanumeric, and "-textfield subject" were used
as arguments.

dscho/nmh,dscho/nmh,mcr/nmh,dscho/nmh,mcr/nmh,dscho/nmh