QFontDatabase: Fall back to "Any" writing system if none matches

The scriptForWritingSystem array has significantly fewer entries than
QChar::Script. It can easily happen that we don't find a writing system
for a given script. In that case, just assume any writing system can
be used.

This fixes an out-of-bounds array access resulting from the writing
system index being one-past-end if std::find doesn't find a match.

Change-Id: Ic277be1dad71af42d479e70e0b4bf29a7dc8d0a7
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>

0 files changed, 0 insertions, 0 deletions