uic: Fix possible crash when reading the size hint property

It may crash on (probably a bit broken)
qtbase/src/printsupport/dialogs/qpagesetupwidget.ui

Change-Id: Ibca95a3d8aa4899adbc952aee7b46621ac888c6a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 4 insertions, 3 deletions

diff --git a/src/tools/uic/cpp/cppwriteinitialization.cpp b/src/tools/uic/cpp/cppwriteinitialization.cpp
index bbef010a9c..d208ec6718 100644
--- a/src/tools/uic/cpp/cppwriteinitialization.cpp
+++ b/src/tools/uic/cpp/cppwriteinitialization.cpp
@@ -84,9 +84,10 @@ namespace {
         int w = 0;
         int h = 0;
         if (properties.contains(QLatin1String("sizeHint"))) {
-            const DomSize *sizeHint = properties.value(QLatin1String("sizeHint"))->elementSize();
-            w = sizeHint->elementWidth();
-            h = sizeHint->elementHeight();
+            if (const DomSize *sizeHint = properties.value(QLatin1String("sizeHint"))->elementSize()) {
+                w = sizeHint->elementWidth();
+                h = sizeHint->elementHeight();
+            }
         }
         output << w << ", " << h << ", ";