main: Don't call g_type_init from meta_init

For the plugin system, GType has to have been initialized by now.

https://bugzilla.gnome.org/show_bug.cgi?id=676855

src/core/main.c

@@ -381,8 +381,6 @@ meta_init (void)
   struct sigaction act;
   sigset_t empty_mask;
   GIOChannel *channel;
-
-  g_type_init ();
   
   sigemptyset (&empty_mask);
   act.sa_handler = SIG_IGN;