[Nmh-workers] pager for mhshow of non-text parts?

i'm getting an unexpected invocation of less when running mhshow on
non-text parts.  i.e., if part 3 is image/jpeg, then

    MHSHOW=/dev/null mhshow -form mhl.null -part 3

gives this process tree:

  mhshow -form mhl.null -part 3
   \_ less
   \_ sh -c xv -geometry =-0+0 '/home/pgf/Mail/mhshowPnswsQ.jpeg' "$@" /bin/sh
       \_ xv -geometry =-0+0 /home/pgf/Mail/mhshowPnswsQ.jpeg

the text that's passed through less is the part separator line:

    part 3     image/jpeg                 20K

it doesn't seem to me that less should be run for non-text parts,
nor should the part separator be displayed when mhshowing a specific
part.  (i suspect the two things are linked, of course.)

in addition, on this particular message i'm getting an unexpected
error after the viewing process (xv) is finished:

    $ MHSHOW=/dev/null mhshow -form mhl.null -part 3 10
    part 3     image/jpeg                 20K
    mhshow: don't know how to display any of the contents
            (content multipart/alternative in message 10, part 1)

(the error message actually goes through less as well.)

mhlist says this for the message:

    $ mhlist -verbose -disposition 10
     msg part  type/subtype              size description
      10       multipart/related         402K
                 boundary="----=_NextPart_000_00A4_01CF5697.7FF77D10"
        1     multipart/alternative      32K
                 boundary="----=_NextPart_001_00A5_01CF5697.7FFB2690"
        1.1   text/html                  20K
                 charset="ISO-8859-1"
        1.2   text/plain                 10K
                 charset="ISO-8859-1"
        2     image/jpeg                 37K
                 name="image002.jpg"
        3     image/jpeg                 20K
                 name="image005.jpg"
        4     image/jpeg                 19K
                 name="image007.jpg"
        5     image/jpeg                 29K
                 name="image009.jpg"
        6     image/jpeg                 18K
                 name="image011.jpg"
        7     image/jpeg                 36K
                 name="image018.jpg"
        8     image/jpeg                 32K
                 name="image020.jpg"
        9     image/jpeg                 16K
                 name="image022.jpg"
        10    image/jpeg                 27K
                 name="image024.jpg"
        11    image/jpeg                 33K
                 name="image030.jpg"


paul
----------------------
 paul fox, pgf(_at_)foxharp(_dot_)boston(_dot_)ma(_dot_)us (arlington, ma, 
where it's 65.5 degrees)

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