pidgin/pidgin

media: Fix gstreamer 0.10 compat (gst_registry_get() is missing there)

So this replaces it with gst_registry_get_default()
--- a/libpurple/media/backend-fs2.c Sat Jun 18 21:09:49 2016 -0500
+++ b/libpurple/media/backend-fs2.c Sun Jun 19 01:08:36 2016 -0300
@@ -44,6 +44,10 @@
#include <gst/gststructure.h>
#endif
+#if !GST_CHECK_VERSION(1,0,0)
+#define gst_registry_get() gst_registry_get_default()
+#endif
+
/** @copydoc _PurpleMediaBackendFs2Class */
typedef struct _PurpleMediaBackendFs2Class PurpleMediaBackendFs2Class;
/** @copydoc _PurpleMediaBackendFs2Private */