[gnome-control-center] display: Use correctly typed pointer

[Debarshi Ray <debarshir src gnome org>]

commit 3d8cd197c95fbf442e1dbc0930c328c86ca5e560
Author: Dave Airlie <airlied redhat com>
Date:   Thu Oct 16 08:44:48 2014 +1000

    display: Use correctly typed pointer
    
    We already assign list->data to output.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=750312

 panels/display/cc-display-panel.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/panels/display/cc-display-panel.c b/panels/display/cc-display-panel.c
index 787ce4a..072429b 100644
--- a/panels/display/cc-display-panel.c
+++ b/panels/display/cc-display-panel.c
@@ -1429,8 +1429,8 @@ on_area_paint (FooScrollArea  *area,
       cairo_fill (cr);
 
       cairo_translate (cr, x, y);
-      paint_output (self, cr, self->priv->current_configuration, list->data,
-                    cc_display_panel_get_output_id (list->data),
+      paint_output (self, cr, self->priv->current_configuration, output,
+                    cc_display_panel_get_output_id (output),
                     w * scale, h * scale);
 
       cairo_restore (cr);