Remove glibism!

src/hb-ot-shape-private.h

diff --git a/src/hb-ot-shape-private.h b/src/hb-ot-shape-private.h
index 730f8f1..bece36d 100644
--- a/src/hb-ot-shape-private.h
+++ b/src/hb-ot-shape-private.h
@@ -34,14 +34,14 @@
 
 HB_BEGIN_DECLS
 
-HB_INTERNAL gboolean
+HB_INTERNAL hb_bool_t
 _hb_ot_substitute_complex (hb_font_t    *font,
 			   hb_face_t    *face,
 			   hb_buffer_t  *buffer,
 			   hb_feature_t *features,
 			   unsigned int  num_features);
 
-HB_INTERNAL gboolean
+HB_INTERNAL hb_bool_t
 _hb_ot_position_complex (hb_font_t    *font,
 			 hb_face_t    *face,
 			 hb_buffer_t  *buffer,

src/hb-ot-shape.c

diff --git a/src/hb-ot-shape.c b/src/hb-ot-shape.c
index 92b3a77..795fd54 100644
--- a/src/hb-ot-shape.c
+++ b/src/hb-ot-shape.c
@@ -114,7 +114,7 @@
 }
 
 
-gboolean
+hb_bool_t
 _hb_ot_substitute_complex (hb_font_t    *font,
 			   hb_face_t    *face,
 			   hb_buffer_t  *buffer,
@@ -138,7 +138,7 @@
   return TRUE;
 }
 
-gboolean
+hb_bool_t
 _hb_ot_position_complex (hb_font_t    *font,
 			 hb_face_t    *face,
 			 hb_buffer_t  *buffer,

src/hb-shape.c

diff --git a/src/hb-shape.c b/src/hb-shape.c
index 1819a85..cde599d 100644
--- a/src/hb-shape.c
+++ b/src/hb-shape.c
@@ -120,7 +120,7 @@
   hb_map_glyphs (font, face, buffer);
 }
 
-static gboolean
+static hb_bool_t
 hb_substitute_complex (hb_font_t    *font,
 		       hb_face_t    *face,
 		       hb_buffer_t  *buffer,
@@ -163,7 +163,7 @@
   }
 }
 
-static gboolean
+static hb_bool_t
 hb_position_complex (hb_font_t    *font,
 		     hb_face_t    *face,
 		     hb_buffer_t  *buffer,