CODA: Fixed crash when redeploying

Change-Id: Id154468d6ee4db4eb045fde8a0e858ad5b17428f
Reviewed-on: http://codereview.qt-project.org/4469

Reviewed-by: Paweł Polański <jaggernod@gmail.com>

src/plugins/qt4projectmanager/qt-s60/codaruncontrol.cpp

@@ -321,6 +321,10 @@ void CodaRunControl::handleAddListener(const CodaCommandResult &result)
 void CodaRunControl::handleDebugSessionStarted(const CodaCommandResult &result)
 {
     Q_UNUSED(result)
+    if (m_codaDevice.isNull()) {
+        finishRunControl();
+        return;
+    }
     m_state = StateDebugSessionStarted;
     m_codaDevice->sendLoggingAddListenerCommand(CodaCallback(this, &CodaRunControl::handleAddListener));
 }