Properly set "seen" and "unseen" flags when moving messages from the new to the old folder when using IMAP for voicemail storage

(closes issue #13905)
Reported by: jaroth
Patches:
      foldermove_v2.patch uploaded by jaroth (license 50)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@173773 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_voicemail.c

@@ -5388,9 +5388,12 @@ static int save_to_folder(struct ast_vm_user *vmu, struct vm_state *vms, int msg
 	
 	ast_debug(3, "Copying sequence %s to mailbox %s\n", sequence, mbox(box));
 	ast_mutex_lock(&vms->lock);
+	/* if save to Old folder, put in INBOX as read */
 	if (box == OLD_FOLDER) {
 		mail_setflag(vms->mailstream, sequence, "\\Seen");
+		mail_clearflag(vms->mailstream, sequence, "\\Unseen");
 	} else if (box == NEW_FOLDER) {
+		mail_setflag(vms->mailstream, sequence, "\\Unseen");
 		mail_clearflag(vms->mailstream, sequence, "\\Seen");
 	}
 	if (!strcasecmp(mbox(NEW_FOLDER), vms->curbox) && (box == NEW_FOLDER || box == OLD_FOLDER)) {