QStyleSheetsStyle: Avoid possible division by zero

Change-Id: I5a7588c07106227e2a8b5e1f180230ef5b0342d1
Task-number: QTBUG-65228
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/widgets/styles/qstylesheetstyle.cpp b/src/widgets/styles/qstylesheetstyle.cpp
index 8ff8ab65a6..f70313d49e 100644
--- a/src/widgets/styles/qstylesheetstyle.cpp
+++ b/src/widgets/styles/qstylesheetstyle.cpp
@@ -3971,10 +3971,11 @@ void QStyleSheetStyle::drawControl(ControlElement ce, const QStyleOption *opt, Q
                         x += reverse ? -chunkWidth : chunkWidth;
                         --chunkCount;
                     };
-                } else {
+                } else if (chunkWidth > 0) {
+                    const int chunkCount = ceil(qreal(fillWidth)/chunkWidth);
                     int x = reverse ? r.left() + r.width() - chunkWidth : r.x();
 
-                    for (int i = 0; i < ceil(qreal(fillWidth)/chunkWidth); ++i) {
+                    for (int i = 0; i < chunkCount; ++i) {
                         r.setRect(x, rect.y(), chunkWidth, rect.height());
                         r = m.mapRect(QRectF(r)).toRect();
                         subRule.drawRule(p, r);