tdf#92434 - A series of hideous knock-on dbaccess crasher fixes.

Focus events during dispose, unfortunate incoming a11y events, etc.

Change-Id: Iee296b767839904f5f330786891bc2513ca06c0c
Reviewed-on: https://gerrit.libreoffice.org/16672Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/16686Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

dbaccess/source/ui/querydesign/TableWindowAccess.cxx

@@ -105,7 +105,7 @@ namespace dbaui
     {
         ::osl::MutexGuard aGuard( m_aMutex );
         Reference< XAccessible > aRet;
-        if(m_pTable)
+        if(m_pTable && !m_pTable->IsDisposed())
         {
             switch(i)
             {
@@ -151,7 +151,7 @@ namespace dbaui
     {
         ::osl::MutexGuard aGuard( m_aMutex  );
         Reference< XAccessible > aRet;
-        if( m_pTable )
+        if(m_pTable && !m_pTable->IsDisposed())
         {
             Point aPoint(_aPoint.X,_aPoint.Y);
             Rectangle aRect(m_pTable->GetDesktopRectPixel());

dbaccess/source/ui/relationdesign/RelationDesignView.cxx

@@ -69,7 +69,7 @@ bool ORelationDesignView::PreNotify( NotifyEvent& rNEvt )
     bool nDone = false;
     if(rNEvt.GetType() == MouseNotifyEvent::GETFOCUS)
     {
-        if(!m_pTableView->HasChildPathFocus())
+        if(m_pTableView && !m_pTableView->HasChildPathFocus())
         {
             m_pTableView->GrabTabWinFocus();
             nDone = true;

svtools/source/contnr/treelistbox.cxx

@@ -444,6 +444,7 @@ VCL_BUILDER_DECL_FACTORY(SvTreeListBox)
 
 void SvTreeListBox::Clear()
 {
+    if (pModel)
         pModel->Clear();  // Model calls SvTreeListBox::ModelHasCleared()
 }