[dia] [warningectomy] Fix const warnings just introduced

[Hans Breuer <hans src gnome org>]

commit 48828032b7b29f17e5e743bf8b1860e0239cf77e
Author: Hans Breuer <hans breuer org>
Date:   Thu Jan 2 13:35:00 2014 +0100

    [warningectomy] Fix const warnings just introduced

 objects/standard/image.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/objects/standard/image.c b/objects/standard/image.c
index a2d1851..b56072a 100644
--- a/objects/standard/image.c
+++ b/objects/standard/image.c
@@ -186,7 +186,7 @@ image_get_props(Image *image, GPtrArray *props)
 {
   if (image->inline_data) {
     if (image->pixbuf != dia_image_pixbuf (image->image))
-      image->pixbuf = (GdkPixbuf *)g_object_ref (dia_image_pixbuf (image->image));
+      image->pixbuf = g_object_ref ((GdkPixbuf *) dia_image_pixbuf (image->image));
   }
   object_get_props_from_offsets(&image->element.object, image_offsets, props);
 }
@@ -214,7 +214,7 @@ image_set_props(Image *image, GPtrArray *props)
       image->image = dia_image_new_from_pixbuf (image->pixbuf ? image->pixbuf : pixbuf);
       if (image->pixbuf)
         g_object_unref (image->pixbuf);
-      image->pixbuf = (GdkPixbuf *)g_object_ref (dia_image_pixbuf (image->image));
+      image->pixbuf = g_object_ref ((GdkPixbuf *)dia_image_pixbuf (image->image));
       if (pixbuf)
        g_object_unref (pixbuf);
     } else {
@@ -583,7 +583,7 @@ image_copy(Image *image)
    * for every single undoable step */
   newimage->inline_data = image->inline_data;
   if (image->pixbuf)
-    newimage->pixbuf = g_object_ref (dia_image_pixbuf(newimage->image));
+    newimage->pixbuf = g_object_ref ((GdkPixbuf *)dia_image_pixbuf(newimage->image));
   else
     newimage->pixbuf = image->pixbuf; /* Just say NULL */