[totem] Fix screensaver code warnings

[Bastien Nocera <hadess src gnome org>]

commit af8b6fa4701429a53590be8d803429e9b8b4c846
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Oct 16 16:34:44 2009 +0100

    Fix screensaver code warnings
    
    Avoid warnings because of our re-use of GErrors.
    
    When the "new" (-ish) APIs of gnome-screensaver fail, don't overwrite
    the existing GError, and print the original error.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=598173

 lib/totem-scrsaver.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/lib/totem-scrsaver.c b/lib/totem-scrsaver.c
index 089cbb0..6854ed4 100644
--- a/lib/totem-scrsaver.c
+++ b/lib/totem-scrsaver.c
@@ -130,10 +130,12 @@ screensaver_inhibit_dbus (TotemScrsaver *scr,
 			/* try the old API */
 			res = dbus_g_proxy_call (scr->priv->gs_proxy,
 						 "InhibitActivation",
-						 &error,
+						 NULL,
 						 G_TYPE_STRING, reason,
 						 G_TYPE_INVALID,
 						 G_TYPE_INVALID);
+			if (res)
+				g_error_free (error);
 		}
 
 		g_free (reason);
@@ -153,9 +155,11 @@ screensaver_inhibit_dbus (TotemScrsaver *scr,
 			/* try the old API */
 			res = dbus_g_proxy_call (scr->priv->gs_proxy,
 						 "AllowActivation",
-						 &error,
+						 NULL,
 						 G_TYPE_INVALID,
 						 G_TYPE_INVALID);
+			if (res)
+				g_error_free (error);
 		}
 	}