[PATCH v4 1/7] emacs: help: check for nil key binding

[Mark Walters]

A standard way to unset a key binding is local-unset-key which is equivalent to
  (define-key (current-local-map) key nil)

Currently notmuch-help gives an error and fails if a user has done this.

To fix this we only add a help line if the binding is non-nil.
---
 emacs/notmuch-lib.el |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
index 08a86fd..5e734b3 100644
--- a/emacs/notmuch-lib.el
+++ b/emacs/notmuch-lib.el
@@ -254,7 +254,7 @@ prefix argument.  PREFIX and TAIL are used internally."
 	    (setq tail
 		  (notmuch-describe-keymap
 		   binding ua-keys (notmuch-prefix-key-description key) tail)))
-	   (t
+	   (binding
 	    (when (and ua-keys (symbolp binding)
 		       (get binding 'notmuch-prefix-doc))
 	      ;; Documentation for prefixed command
-- 
1.7.9.1