[ot] Search globally for 'vert' feature if not found in specified script/lang
Fixes https://github.com/behdad/harfbuzz/issues/63
diff --git a/src/hb-ot-layout-private.hh b/src/hb-ot-layout-private.hh
index d854563..a98734a 100644
--- a/src/hb-ot-layout-private.hh
+++ b/src/hb-ot-layout-private.hh
@@ -36,6 +36,15 @@
#include "hb-set-private.hh"
+/* Private API corresponding to hb-ot-layout.h: */
+
+HB_INTERNAL hb_bool_t
+hb_ot_layout_table_find_feature (hb_face_t *face,
+ hb_tag_t table_tag,
+ hb_tag_t feature_tag,
+ unsigned int *feature_index);
+
+
/*
* GDEF
*/
