fix check 049: font => ttFont
fix check 049: font => ttFont

(issue #1388)

moyogo/fontbakery,moyogo/fontbakery,graphicore/fontbakery,graphicore/fontbakery,googlefonts/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,graphicore/fontbakery,googlefonts/fontbakery