don't delete the tipwidget if the application is closing; there's no point to it (OS will reclaim the mem for us), it has no state to save on destruction and it causes issues when deleted too late (due to the static object deletion)

svn path=/trunk/KDE/kdelibs/; revision=882208

tooltipmanager.cpp

@@ -22,6 +22,7 @@
 #include "tooltipmanager.h"
 
 //Qt
+#include <QCoreApplication>
 #include <QLabel>
 #include <QTimer>
 #include <QGridLayout>
@@ -66,8 +67,9 @@ public :
 
     ~ToolTipManagerPrivate()
     {
-        clearTips();
-        delete tipWidget;
+        if (!QCoreApplication::closingDown()) {
+            delete tipWidget;
+        }
     }
 
     void showToolTip();