[totem] backend: Fix missing plugins compile-time warning

[Bastien Nocera <hadess src gnome org>]

commit 7d4c3d20d97e08f2e3a6ac877d206e36cf3fec0a
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Apr 9 18:33:45 2013 +0200

    backend: Fix missing plugins compile-time warning

 .../bacon-video-widget-gst-missing-plugins.c       |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/backend/bacon-video-widget-gst-missing-plugins.c 
b/src/backend/bacon-video-widget-gst-missing-plugins.c
index d73f511..c7fb7c8 100644
--- a/src/backend/bacon-video-widget-gst-missing-plugins.c
+++ b/src/backend/bacon-video-widget-gst-missing-plugins.c
@@ -299,7 +299,7 @@ bacon_video_widget_gst_on_missing_plugins_event (BaconVideoWidget *bvw, char **d
        }
 #endif /* GDK_WINDOWING_X11 */
 
-       status = gst_install_plugins_async (ctx->details, install_ctx,
+       status = gst_install_plugins_async ((const char * const*) ctx->details, install_ctx,
                                            on_plugin_installation_done,
                                            ctx);