[empathy] Properly check if the backlog flag is set

[Sjoerd Simons <sjoerds src gnome org>]

commit 1560313cdfafa660b7400f44217a8741785e3103
Author: Sjoerd Simons <sjoerd simons collabora co uk>
Date:   Fri Aug 12 12:21:45 2011 +0200

    Properly check if the backlog flag is set
    
    The backlog flag should be TRUE or FALSE, so the check for the flag
    should result in either of those two values, not some other non-false
    value

 libempathy/empathy-message.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/libempathy/empathy-message.c b/libempathy/empathy-message.c
index 1c18cf5..06b3308 100644
--- a/libempathy/empathy-message.c
+++ b/libempathy/empathy-message.c
@@ -787,6 +787,7 @@ empathy_message_new_from_tp_message (TpMessage *tp_msg,
 	gint64 timestamp;
 	gint64 original_timestamp;
 	const GHashTable *part = tp_message_peek (tp_msg, 0);
+	gboolean is_backlog;
 
 	g_return_val_if_fail (TP_IS_MESSAGE (tp_msg), NULL);
 
@@ -799,6 +800,9 @@ empathy_message_new_from_tp_message (TpMessage *tp_msg,
 	original_timestamp = tp_asv_get_int64 (part,
 		"original-message-received", NULL);
 
+	is_backlog = (flags & TP_CHANNEL_TEXT_MESSAGE_FLAG_SCROLLBACK) ==
+		TP_CHANNEL_TEXT_MESSAGE_FLAG_SCROLLBACK;
+
 	message = g_object_new (EMPATHY_TYPE_MESSAGE,
 		"body", body,
 		"token", tp_message_get_token (tp_msg),
@@ -807,7 +811,7 @@ empathy_message_new_from_tp_message (TpMessage *tp_msg,
 		"timestamp", timestamp,
 		"original-timestamp", original_timestamp,
 		"flags", flags,
-		"is-backlog", flags & TP_CHANNEL_TEXT_MESSAGE_FLAG_SCROLLBACK,
+		"is-backlog", is_backlog,
 		"incoming", incoming,
 		"tp-message", tp_msg,
 		NULL);