directfb: fix QThread destroyed while running

Commit cf092abdfc introduces a virtual
"void initialize()" in QPlatformIntegration class.

"void initialize()" was already implemented in QDirectFbIntegration
since commit 6534898cc6 allowing
initialization steps to be overridden by QDirectFbIntegrationEGL.

Therefore the QScopePointer "m_input" handling a QThread is reset twice.
The QThread firstly created is forcibly terminated. The application
displays the error message "QThread: Destroyed while thread is still
running" and sometimes crash with a SIGSEGV.

This commit rename QDirectFbIntegration::initialize() into
QDirectFbIntegration::connectToDirectFb() to fix this issue.

Task-number: QTBUG-38710
Change-Id: I3ca07c373af7c47abf08da2b45bbcf7a6cf573ad
Reviewed-by: Holger Freyther <holger+qt@freyther.de>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

src/plugins/platforms/directfb/main.cpp

@@ -75,7 +75,8 @@ QPlatformIntegration * QDirectFbIntegrationPlugin::create(const QString& system,
     if (!integration)
         return 0;
 
-    integration->initialize();
+    integration->connectToDirectFb();
+
     return integration;
 }
 

src/plugins/platforms/directfb/qdirectfbintegration.cpp

@@ -64,7 +64,7 @@ QDirectFbIntegration::QDirectFbIntegration()
 {
 }
 
-void QDirectFbIntegration::initialize()
+void QDirectFbIntegration::connectToDirectFb()
 {
     initializeDirectFB();
     initializeScreen();

src/plugins/platforms/directfb/qdirectfbintegration.h

@@ -60,7 +60,7 @@ public:
     QDirectFbIntegration();
     ~QDirectFbIntegration();
 
-    void initialize();
+    void connectToDirectFb();
 
     QPlatformPixmap *createPlatformPixmap(QPlatformPixmap::PixelType type) const;
     QPlatformWindow *createPlatformWindow(QWindow *window) const;