gui/ocarina: Deinitialize core first

This fixes a segfault I was getting when closing ocarina before the
directory scan finishes.

Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>

gui/ocarina.cpp

@@ -73,9 +73,9 @@ int main(int argc, char **argv)
 
 	ocarina_app->signal_window_removed().connect(sigc::ptr_fun(on_window_removed));
 	ocarina_app->run(*window, argc, argv);
+	core :: deinit();
 	cleanup_tabs();
 	gst :: quit();
-	core :: deinit();
 
 	return 0;
 }