InfoBar: Initialize member on default ctor

Reported by Coverity.

Change-Id: I00f166af79400d373c0fdf2c2db2b6d8b3d29b16
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/utils/infobar.h

@@ -98,7 +98,7 @@ private:
     QList<Button> m_buttons;
     QString m_cancelButtonText;
     CallBack m_cancelButtonCallBack;
-    GlobalSuppression m_globalSuppression;
+    GlobalSuppression m_globalSuppression = GlobalSuppression::Disabled;
     DetailsWidgetCreator m_detailsWidgetCreator;
     bool m_useCancelButton = true;
     Combo m_combo;