* src/sfnt/ttkern.h (TT_FACE_HAS_KERNING): Remove macro.

Given that we also support (limited) 'GPOS' table kerning if
`TT_CONFIG_OPTION_GPOS_KERNING` is defined, the name of this macro is
misleading since it only is true for 'kern' table kerning.

* src/sfnt/sfobjs.c (sfn_load_face): Replace `TT_FACE_HAS_KERNING` with
  plain code.

src/sfnt/sfobjs.c

@@ -1127,7 +1127,7 @@
         flags |= FT_FACE_FLAG_VERTICAL;
 
       /* kerning available ? */
-      if ( TT_FACE_HAS_KERNING( face )
+      if ( face->kern_avail_bits
 #ifdef TT_CONFIG_OPTION_GPOS_KERNING
            || face->gpos_kerning_available
 #endif

src/sfnt/ttkern.h

@@ -40,8 +40,6 @@ FT_BEGIN_HEADER
                        FT_UInt     left_glyph,
                        FT_UInt     right_glyph );
 
-#define TT_FACE_HAS_KERNING( face )  ( (face)->kern_avail_bits != 0 )
-
 
 FT_END_HEADER
 

src/truetype/ttdriver.c

@@ -220,7 +220,7 @@
     {
       /* Use 'kern' table if available since that can be faster; otherwise */
       /* use GPOS kerning pairs if available.                              */
-      if ( ttface->kern_avail_bits != 0 )
+      if ( ttface->kern_avail_bits )
         kerning->x = sfnt->get_kerning( ttface,
                                         left_glyph,
                                         right_glyph );