anchor.diff:     End Else
      If numberOfContours < 0 Then
      Begin
  -      // @TODO other compound variations?
  +      // TODO other compound variations?
         //STBTT_assert(0);
      End Else
      Begin
  
positive.code:    t := stbtt__find_table('maxp');
  
     if t<>0 then
        numGlyphs := ttUSHORT(t+4)
     else
        numGlyphs := -1;
  
     // find a cmap encoding table we understand *now* to avoid searching
     // later. (todo: could make this installable)
  
negative.code: var
     g1, g2: Integer;
  begin
     if glyph_index >= _GlyphCount then
     begin
        Result := -1; // glyph index out of range
        Exit;
  