[brasero] Silenced a warning

[Philippe Rouquier <philippr src gnome org>]

commit 5fbec4aeb41c816e22d7dffc4fce95065e42ea61
Author: Philippe Rouquier <bonfire-app wanadoo fr>
Date:   Fri Sep 4 12:25:43 2009 +0200

    Silenced a warning

 libbrasero-burn/brasero-session.c |    3 +++
 libbrasero-burn/burn-job.c        |    6 ++++++
 2 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/libbrasero-burn/brasero-session.c b/libbrasero-burn/brasero-session.c
index c0f9dd9..1d0f6f9 100644
--- a/libbrasero-burn/brasero-session.c
+++ b/libbrasero-burn/brasero-session.c
@@ -765,6 +765,9 @@ brasero_burn_session_get_rate (BraseroBurnSession *self)
 		return 0;
 
 	medium = brasero_drive_get_medium (priv->settings->burner);
+	if (!medium)
+		return 0;
+
 	max_rate = brasero_medium_get_max_write_speed (medium);
 	if (priv->settings->rate <= 0)
 		return max_rate;
diff --git a/libbrasero-burn/burn-job.c b/libbrasero-burn/burn-job.c
index 216a9a8..79ffc5e 100644
--- a/libbrasero-burn/burn-job.c
+++ b/libbrasero-burn/burn-job.c
@@ -1666,6 +1666,9 @@ brasero_job_get_max_rate (BraseroJob *self, guint64 *rate)
 	drive = brasero_burn_session_get_burner (session);
 	medium = brasero_drive_get_medium (drive);
 
+	if (!medium)
+		return BRASERO_BURN_NOT_READY;
+
 	*rate = brasero_medium_get_max_write_speed (medium);
 
 	return BRASERO_BURN_OK;
@@ -1690,6 +1693,9 @@ brasero_job_get_max_speed (BraseroJob *self, guint *speed)
 
 	drive = brasero_burn_session_get_burner (session);
 	medium = brasero_drive_get_medium (drive);
+	if (!medium)
+		return BRASERO_BURN_NOT_READY;
+
 	rate = brasero_medium_get_max_write_speed (medium);
 	media = brasero_medium_get_status (medium);
 	if (media & BRASERO_MEDIUM_DVD)