Merge pull request #300 from thierryvolpiatto/master

* fix empty buffer when replying and prevent user calling a new update when one is already running.

mu4e/mu4e-compose.el

@@ -377,7 +377,7 @@ tempfile)."
    ;; hide some headers
   (mu4e~compose-hide-headers)
   ;; switch on the mode
-  (mu4e-compose-mode))
+  (run-with-timer 0.01 nil #'(lambda () (mu4e-compose-mode))))
 
 
 (defun mu4e-sent-handler (docid path)

mu4e/mu4e-utils.el

@@ -805,6 +805,10 @@ The messages are inserted into the process buffer."
 run-in-background is non-nil (or called with prefix-argument), run
 in the background; otherwise, pop up a window."
   (interactive "P")
+  (when (and mu4e~update-buffer-name
+             (get-buffer-process
+              (get-buffer mu4e~update-buffer-name)))
+    (mu4e-error "Update process is already running"))
   (run-hooks 'mu4e-update-pre-hook)
   (unless mu4e-get-mail-command
     (mu4e-error "`mu4e-get-mail-command' is not defined"))