emacs/show: Accommodate the lack of part header buttons
authorDavid Edmondson <dme@dme.org>
Sat, 20 Feb 2016 18:24:37 +0000 (18:24 +0000)
committerDavid Bremner <david@tethera.net>
Sun, 21 Feb 2016 12:37:17 +0000 (08:37 -0400)
commitc802d12a1e43fe69f2fcf7a2f7d44018a55bfb65
tree412b1727943c4bae54d25e9e5814d63be2c02a5d
parent92a1f9ba171713ada2c16af16b84acd67182b88c
emacs/show: Accommodate the lack of part header buttons

Various pieces of code assumed (reasonably) that part header buttons
are present. Modify them to avoid problems if no part headers were
inserted.
emacs/notmuch-show.el