The pointSize() of a font can return -1 if the font was originally specificied
with a pixelSize. Work around this by using QFontInfo to calculate the correct
value.
Additionally, don't use the pointSize() of a font when we can instead use the
calculated size.
This fixes the problem with the missing star ratings on Android.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
a7d1dbd013