Gracefully reject requests for absurd font sizes
Avoid overflows.
Fixes: QTBUG-89899
Pick-to: 6.0 5.15 5.12
Change-Id: Ic1a83c1704fe20be3d032358dc91ee8e751f2281
Reviewed-by: Eskil Abrahamsen Blomfeldt eskil.abrahamsen-blomfeldt@qt.io
(cherry picked from commit 67975068)
Edited by Albert Astals Cid