[pinpoint] Do not show previous/next preview on first/last slide

[Ãyvind KolÃs <ok src gnome org>]

commit 61168ad6de3f1336d2380cb2c919c7e8b989d049
Author: Christoph Fischer <chris toph de>
Date:   Mon May 7 20:31:44 2012 +0200

    Do not show previous/next preview on first/last slide

 pp-clutter.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/pp-clutter.c b/pp-clutter.c
index 0d44c26..741f059 100644
--- a/pp-clutter.c
+++ b/pp-clutter.c
@@ -1951,6 +1951,15 @@ static gboolean update_speaker_screen (ClutterRenderer *renderer)
     elapsed_part = current_slide_time / current_slide_duration;
   }
 
+  // if first slide, do not show "previous"
+  if (!pp_slidep->prev) clutter_actor_hide(renderer->speaker_prev);
+  else clutter_actor_show(renderer->speaker_prev);
+
+  // same for last slide
+  if (!pp_slidep->next) clutter_actor_hide(renderer->speaker_next);
+  else clutter_actor_show(renderer->speaker_next);
+
+
   {
     float scale;
     scale = nh / clutter_actor_get_height (renderer->speaker_next) * 0.4;