Applied Neil W Rickert <rickert+nmh@cs.niu.edu>'s msh.c patch:

Applied Neil W Rickert <rickert+nmh@cs.niu.edu>'s msh.c patch:

    I finally tracked down the problem in msh that was causing errors
    whenever I tried to examine a 'mmdf' style mailbox.

    It turns out that not enough memory was being allocated with
    calloc(), causing memory pointers to be overwritten and corrupted.