[gnome-color-manager] Zero out GErrors after freeing. Fixes crash.

[Richard Hughes <rhughes src gnome org>]

commit 6adf45cc4acd50bdb333b63621b6e9c2bec92f43
Author: Christian Hergert <christian hergert gmail com>
Date:   Tue Jan 26 19:15:23 2010 -0800

    Zero out GErrors after freeing. Fixes crash.
    
    From a8abf583ab31c38a80c8ce570efa47d2a981c6f9 Mon Sep 17 00:00:00 2001
    From: Christian Hergert <chris dronelabs com>
    Date: Tue, 26 Jan 2010 19:09:37 -0800
    Subject: [PATCH] Zero out GErrors after freeing.  Fixes crash.

 src/gcm-prefs.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/gcm-prefs.c b/src/gcm-prefs.c
index 60e04a9..b3cfeae 100644
--- a/src/gcm-prefs.c
+++ b/src/gcm-prefs.c
@@ -2526,6 +2526,7 @@ gcm_prefs_startup_phase1_idle_cb (gpointer user_data)
 	if (!ret) {
 		egg_warning ("failed to coldplug: %s", error->message);
 		g_error_free (error);
+		error = NULL;
 		/* do not fail */
 	}
 
@@ -2534,6 +2535,7 @@ gcm_prefs_startup_phase1_idle_cb (gpointer user_data)
 	if (!ret) {
 		egg_warning ("failed to coldplug: %s", error->message);
 		g_error_free (error);
+		error = NULL;
 		goto out;
 	}
 
@@ -2542,6 +2544,7 @@ gcm_prefs_startup_phase1_idle_cb (gpointer user_data)
 	if (!ret) {
 		egg_warning ("failed to coldplug: %s", error->message);
 		g_error_free (error);
+		error = NULL;
 		/* do not fail */
 	}