print/freetype2: fix incorrect line spacing for some fonts

Problem description: After updating to print/freetypw2-2.8.0 using
Bitstream Vera Sans Mono the vertical pitch increases and significantly
add of the size of the window. See attached images.

See PR for lots of links to related reports upstream
and on other platforms.

PR: 219608
Submitted by: lightside@gmx.com
Reported by: Kevin Oberman <rkoberman@gmail.com>