Fix typo in WindowExt::get_xlib_display
Fix typo in WindowExt::get_xlib_display

ecoal95/glutin,servo/glutin,bvssvni/glutin,tomaka/glutin,vberger/glutin,Ms2ger/glutin,notriddle/glutin,mbrubeck/glutin,adambadawy/glutin,mmatyas/glutin,kornholi/glutin,tomaka/winit,mitchmindtree/glutin,mbrubeck/glutin,nc4rrillo/glutin,ozkriff/glutin