[evolution-data-server/gnome-3-18] Bug 756842 - [Maildir] Do not overwrite received date on the message info

[Milan Crha <mcrha src gnome org>]

commit f1044d6e2d3c5f48c500a8670d025a4125b0dbdc
Author: Milan Crha <mcrha redhat com>
Date:   Tue Oct 20 09:31:02 2015 +0200

    Bug 756842 - [Maildir] Do not overwrite received date on the message info

 camel/providers/local/camel-maildir-summary.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/camel/providers/local/camel-maildir-summary.c b/camel/providers/local/camel-maildir-summary.c
index 2831bfd..04e2c31 100644
--- a/camel/providers/local/camel-maildir-summary.c
+++ b/camel/providers/local/camel-maildir-summary.c
@@ -328,8 +328,10 @@ message_info_new_from_header (CamelFolderSummary *s,
                        mdi = (CamelMaildirMessageInfo *)(mi = info);
                }
 
-               /* with maildir we know the real received date, from the filename */
-               mdi->info.info.date_received = strtoul (camel_message_info_uid (mi), NULL, 10);
+               if (mdi->info.info.date_received <= 0) {
+                       /* with maildir we know the real received date, from the filename */
+                       mdi->info.info.date_received = strtoul (camel_message_info_uid (mi), NULL, 10);
+               }
 
                if (mds->priv->current_file) {
 #if 0