[empathy] call-window: ensure "Swap camera" is only visible when there are >1 cameras

[Jonny Lamb <jonnylamb src gnome org>]

commit 77e07fc2d134a663ff2af3dcb500f3f6c386ee5e
Author: Jonny Lamb <jonnylamb gnome org>
Date:   Tue Aug 20 16:21:57 2013 +0200

    call-window: ensure "Swap camera" is only visible when there are >1 cameras
    
    It was possible to get into a state where "Swap camera" was visible
    even when there was only one camera connected.

 src/empathy-call-window.c |   21 +++++++++++++--------
 1 files changed, 13 insertions(+), 8 deletions(-)
---
diff --git a/src/empathy-call-window.c b/src/empathy-call-window.c
index 39c70c1..7fe365f 100644
--- a/src/empathy-call-window.c
+++ b/src/empathy-call-window.c
@@ -596,25 +596,29 @@ empathy_call_window_swap_camera_cb (GtkAction *action,
 }
 
 static void
-empathy_call_window_camera_added_cb (TpawCameraMonitor *monitor,
-    TpawCamera *camera,
-    EmpathyCallWindow *self)
+empathy_call_window_update_swap_camera (EmpathyCallWindow *self)
 {
-  const GList *cameras = tpaw_camera_monitor_get_cameras (monitor);
+  const GList *cameras = tpaw_camera_monitor_get_cameras (
+      self->priv->camera_monitor);
 
   gtk_action_set_visible (self->priv->menu_swap_camera,
       g_list_length ((GList *) cameras) >= 2);
 }
 
 static void
-empathy_call_window_camera_removed_cb (TpawCameraMonitor *monitor,
+empathy_call_window_camera_added_cb (TpawCameraMonitor *monitor,
     TpawCamera *camera,
     EmpathyCallWindow *self)
 {
-  const GList *cameras = tpaw_camera_monitor_get_cameras (monitor);
+  empathy_call_window_update_swap_camera (self);
+}
 
-  gtk_action_set_visible (self->priv->menu_swap_camera,
-      g_list_length ((GList *) cameras) >= 2);
+static void
+empathy_call_window_camera_removed_cb (TpawCameraMonitor *monitor,
+    TpawCamera *camera,
+    EmpathyCallWindow *self)
+{
+  empathy_call_window_update_swap_camera (self);
 }
 
 static void
@@ -1685,6 +1689,7 @@ empathy_call_window_init (EmpathyCallWindow *self)
   gtk_action_set_sensitive (priv->menu_fullscreen, FALSE);
 
   priv->camera_monitor = tpaw_camera_monitor_dup_singleton ();
+  empathy_call_window_update_swap_camera (self);
 
   g_object_bind_property (priv->camera_monitor, "available",
       priv->camera_button, "sensitive",