[brasero] small change that adds an extra check

[Philippe Rouquier <philippr src gnome org>]

commit bd8f3a34a4301b759625d6335e98e3ed4a822d0d
Author: Philippe Rouquier <bonfire-app wanadoo fr>
Date:   Fri Oct 9 21:16:24 2009 +0200

    small change that adds an extra check

 libbrasero-burn/brasero-session.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libbrasero-burn/brasero-session.c b/libbrasero-burn/brasero-session.c
index 35d2a2a..cce4f86 100644
--- a/libbrasero-burn/brasero-session.c
+++ b/libbrasero-burn/brasero-session.c
@@ -1011,7 +1011,8 @@ brasero_burn_session_set_output_image_real (BraseroBurnSession *self,
 
 	priv = BRASERO_BURN_SESSION_PRIVATE (self);
 
-	if (brasero_track_type_get_image_format (&(priv->settings->output)) == format
+	if (brasero_track_type_get_has_image (&(priv->settings->output))
+	&& brasero_track_type_get_image_format (&(priv->settings->output)) == format
 	&&  BRASERO_STR_EQUAL (image, priv->settings->image)
 	&&  BRASERO_STR_EQUAL (toc, priv->settings->toc)) {
 		if (!BRASERO_BURN_SESSION_WRITE_TO_FILE (priv))