[evolution-ews] Make sure we have a connection before appending a message to the camel folder

[Or Goshen <ogosh src gnome org>]

commit b1437b977db67ad768812e0123aadeab3156448a
Author: Or Goshen <orx goshen intel com>
Date:   Mon Jul 11 12:47:41 2011 +0300

    Make sure we have a connection before appending a message to the camel folder

 src/camel/camel-ews-folder.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/camel/camel-ews-folder.c b/src/camel/camel-ews-folder.c
index 2e770f5..7e20fc2 100644
--- a/src/camel/camel-ews-folder.c
+++ b/src/camel/camel-ews-folder.c
@@ -1045,6 +1045,12 @@ ews_append_message_sync (CamelFolder *folder, CamelMimeMessage *message,
 
 	cnc = camel_ews_store_get_connection(ews_store);
 
+	if (!cnc) {
+		g_set_error (error, CAMEL_ERROR, CAMEL_ERROR_GENERIC,
+			     _("Cant perform actions on the folder while in offline mode"));
+		return FALSE;
+	}
+
 	if (!camel_ews_utils_create_mime_message (cnc, "SaveOnly", folder_id,
 						  message,
 						  camel_message_info_flags (info),