Bug #1890 Opencv 2.4.0 with QT 4.7.4 and cvcreatebutton exception fixed.

QVector range check exception fixed.

Bug #1890 Opencv 2.4.0 with QT 4.7.4 and cvcreatebutton exception fixed.
QVector range check exception fixed.
06a7a1ac · Alexander Smorkalov · f9c61234 · 06a7a1ac
Commit 06a7a1ac authored Sep 16, 2013 by Alexander Smorkalov
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window_QT.cpp modules/highgui/src/window_QT.cpp +2 -1

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--- a/modules/highgui/src/window_QT.cpp
+++ b/modules/highgui/src/window_QT.cpp
@@ -1736,7 +1736,8 @@ void CvWindow::displayStatusBar(QString text, int delayms)

 void CvWindow::enablePropertiesButton()
 {
-    vect_QActions[9]->setDisabled(false);
+    if (!vect_QActions.empty())
+        vect_QActions[9]->setDisabled(false);
 }