Apply patch from Jonathan Kew
diff --git a/src/hb-buffer.h b/src/hb-buffer.h
index afdf642..197c921 100644
--- a/src/hb-buffer.h
+++ b/src/hb-buffer.h
@@ -76,7 +76,7 @@
} hb_buffer_t;
hb_buffer_t *
-hb_buffer_new (void);
+hb_buffer_new (unsigned int allocation_size);
void
hb_buffer_free (hb_buffer_t *buffer);
@@ -85,6 +85,10 @@
hb_buffer_clear (hb_buffer_t *buffer);
void
+hb_buffer_ensure (hb_buffer_t *buffer,
+ unsigned int size);
+
+void
hb_buffer_add_glyph (hb_buffer_t *buffer,
hb_codepoint_t glyph_index,
unsigned int properties,
