From be93c6aeb373c33e1842f001ce37ec98c9e1fb09 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tor=20Arne=20Vestb=C3=B8?= <tor.arne.vestbo@digia.com>
Date: Mon, 7 Jan 2013 23:48:20 +0100
Subject: Don't scale 0-region or region without rects
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Change-Id: Ieb523dadc5d726e26645b3a90652be95c2707ea8
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>
---
 src/widgets/styles/qmacstyle_mac.mm | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src')

diff --git a/src/widgets/styles/qmacstyle_mac.mm b/src/widgets/styles/qmacstyle_mac.mm
index bde33cdb97..5994457eb1 100644
--- a/src/widgets/styles/qmacstyle_mac.mm
+++ b/src/widgets/styles/qmacstyle_mac.mm
@@ -6518,6 +6518,9 @@ void qt_mac_clip_cg(CGContextRef hd, const QRegion &rgn, CGAffineTransform *orig
 // move to QRegion?
 void qt_mac_scale_region(QRegion *region, qreal scaleFactor)
 {
+    if (!region || !region->rectCount())
+        return;
+
     QVector<QRect> scaledRects;
     scaledRects.reserve(region->rects().count());
 
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