Minor.  Hide _hb_ot_layout_get_glyph_property()

src/hb-ot-layout-private.hh

diff --git a/src/hb-ot-layout-private.hh b/src/hb-ot-layout-private.hh
index f860e7b..366b061 100644
--- a/src/hb-ot-layout-private.hh
+++ b/src/hb-ot-layout-private.hh
@@ -51,10 +51,6 @@
 } hb_ot_layout_glyph_class_t;
 
 
-HB_INTERNAL unsigned int
-_hb_ot_layout_get_glyph_property (hb_face_t       *face,
-				  hb_glyph_info_t *info);
-
 HB_INTERNAL hb_bool_t
 _hb_ot_layout_check_glyph_property (hb_face_t    *face,
 				    hb_glyph_info_t *ginfo,

src/hb-ot-layout.cc

diff --git a/src/hb-ot-layout.cc b/src/hb-ot-layout.cc
index 1cec8b4..da65cda 100644
--- a/src/hb-ot-layout.cc
+++ b/src/hb-ot-layout.cc
@@ -94,7 +94,7 @@
   return _get_gdef (face).has_glyph_classes ();
 }
 
-unsigned int
+static unsigned int
 _hb_ot_layout_get_glyph_property (hb_face_t       *face,
 				  hb_glyph_info_t *info)
 {