fonts: Increase the Em size to fix a build failure with freetype 2.8.1.

Freetype 2.8.1 implemented the stricter Em bounds from OpenType 1.8.2
which require a minimum Em size of 16.

Signed-off-by: Michael Stefaniuc <mstefani@winehq.org>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
10 files changed