--- a/QTfrontend/togglebutton.cpp	Sat Dec 18 21:19:26 2010 +0300
+++ b/QTfrontend/togglebutton.cpp	Sat Dec 18 23:02:39 2010 +0300
@@ -19,6 +19,7 @@
 #include "togglebutton.h"
 
 ToggleButtonWidget::ToggleButtonWidget(QWidget * parent, QString img)
+    : QPushButton(parent)
 {
     setCheckable(true);