[gnome-control-center] color: Fix a crash where out internal state gets screwed up

[Richard Hughes <rhughes src gnome org>]

commit e06ccd9c9eec6bb0a61fb3ba9146e2c8130077b3
Author: Richard Hughes <richard hughsie com>
Date:   Mon Aug 22 21:07:10 2011 +0100

    color: Fix a crash where out internal state gets screwed up
    
    I'm just looking for the real bug now.

 panels/color/cc-color-panel.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/panels/color/cc-color-panel.c b/panels/color/cc-color-panel.c
index b172b91..b0ffbb8 100644
--- a/panels/color/cc-color-panel.c
+++ b/panels/color/cc-color-panel.c
@@ -604,6 +604,11 @@ gcm_prefs_button_assign_ok_cb (GtkWidget *widget, CcColorPanel *prefs)
   gtk_tree_model_get (model, &iter,
                       GCM_PREFS_COMBO_COLUMN_PROFILE, &profile,
                       -1);
+  if (profile == NULL)
+    {
+        g_warning ("failed to get the active profile");
+        goto out;
+    }
 
   /* just add it, the list store will get ::changed */
   ret = cd_device_add_profile_sync (priv->current_device,