[API] Add hb_*_get_empty() for all objects
diff --git a/src/hb-buffer.h b/src/hb-buffer.h
index 47a2123..020a120 100644
--- a/src/hb-buffer.h
+++ b/src/hb-buffer.h
@@ -63,6 +63,9 @@
 hb_buffer_create (unsigned int pre_alloc_size);
 
 hb_buffer_t *
+hb_buffer_get_empty (void);
+
+hb_buffer_t *
 hb_buffer_reference (hb_buffer_t *buffer);
 
 void