chart2: add a SolarMutexGuard in ChartView::createInstance()

SvxUnoNameItemTable::SvxUnoNameItemTable() registers a listener at
SdrModel, surely that needs a lock of some kind.

Change-Id: I80d5a31be66e75f07e8abd26504bdcc93ffd22a3

chart2/source/view/main/ChartView.cxx

@@ -321,8 +321,8 @@ ChartView::~ChartView()
 
     if( m_pDrawModelWrapper.get() )
     {
-        EndListening( m_pDrawModelWrapper->getSdrModel(), false /*bAllDups*/ );
         SolarMutexGuard aSolarGuard;
+        EndListening( m_pDrawModelWrapper->getSdrModel(), false /*bAllDups*/ );
         m_pDrawModelWrapper.reset();
     }
     m_xDrawPage = NULL;
@@ -2882,6 +2882,8 @@ void SAL_CALL ChartView::removeVetoableChangeListener( const OUString& /* Proper
 Reference< uno::XInterface > ChartView::createInstance( const OUString& aServiceSpecifier )
     throw (uno::Exception, uno::RuntimeException, std::exception)
 {
+    SolarMutexGuard aSolarGuard;
+
     SdrModel* pModel = ( m_pDrawModelWrapper ? &m_pDrawModelWrapper->getSdrModel() : NULL );
     if ( pModel )
     {