Limit value in setFontWeightFromValue()

QFont::setWeight() just accepts values between 0 and 900 anyway.

Fixes: oss-fuzz-24986
Change-Id: Ic65139a7821be3a12c65444d010736f03c8b74f5
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
(cherry picked from commit ccc205bf38ffbe60180a069939a4aff01e7734e5)
Reviewed-by: Jonas Karlsson <jonas.karlsson@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

src/gui/text/qcssparser.cpp

@@ -1153,7 +1153,7 @@ static bool setFontWeightFromValue(const QCss::Value &value, QFont *font)
     }
     if (value.type != Value::Number)
         return false;
-    font->setWeight(qMin(value.variant.toInt() / 8, 99));
+    font->setWeight(qRound(qBound(0.0, value.variant.toDouble() / 8.0, 99.0)));
     return true;
 }