[libchamplain] Fix a bug where tiles were not loaded if resized vertically

[Pierre-Luc Beaudoin <plbeaudoin src gnome org>]

commit e1c5771b773731b410e02cbde5d56f8a469cebb0
Author: Pierre-Luc Beaudoin <pierre-luc pierlux com>
Date:   Wed Aug 26 00:00:46 2009 -0400

    Fix a bug where tiles were not loaded if resized vertically
    
    This was particularly visible in EOG when a higher image
    was loaded.

 champlain/champlain-view.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/champlain/champlain-view.c b/champlain/champlain-view.c
index 4d2276f..9fa7d19 100644
--- a/champlain/champlain-view.c
+++ b/champlain/champlain-view.c
@@ -184,7 +184,7 @@ static void champlain_view_set_property (GObject *object, guint prop_id,
 static void champlain_view_dispose (GObject *object);
 static void champlain_view_class_init (ChamplainViewClass *champlainViewClass);
 static void champlain_view_init (ChamplainView *view);
-static void viewport_x_changed_cb (GObject *gobject, GParamSpec *arg1,
+static void viewport_pos_changed_cb (GObject *gobject, GParamSpec *arg1,
     ChamplainView *view);
 static void notify_marker_reposition_cb (ChamplainMarker *marker,
     GParamSpec *arg1, ChamplainView *view);
@@ -964,7 +964,9 @@ champlain_view_init (ChamplainView *view)
   g_object_set (G_OBJECT (priv->viewport), "sync-adjustments", FALSE, NULL);
 
   g_signal_connect (priv->viewport, "notify::x-origin",
-      G_CALLBACK (viewport_x_changed_cb), view);
+      G_CALLBACK (viewport_pos_changed_cb), view);
+  g_signal_connect (priv->viewport, "notify::y-origin",
+      G_CALLBACK (viewport_pos_changed_cb), view);
 
   /* Setup finger scroll */
   priv->finger_scroll = g_object_ref (tidy_finger_scroll_new (priv->scroll_mode));
@@ -1017,7 +1019,7 @@ champlain_view_init (ChamplainView *view)
 }
 
 static void
-viewport_x_changed_cb (GObject *gobject,
+viewport_pos_changed_cb (GObject *gobject,
     GParamSpec *arg1,
     ChamplainView *view)
 {