afl-eventesting: deref of null mpTextObj

Change-Id: Icdb7d1cc250640f428984b96b0a51ac950013cb2
(cherry picked from commit 0c39c456)
Reviewed-on: https://gerrit.libreoffice.org/19814Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

sd/source/ui/view/Outliner.cxx

@@ -1272,7 +1272,7 @@ void Outliner::SetPage (EditMode eEditMode, sal_uInt16 nPageIndex)
 void Outliner::EnterEditMode (bool bGrabFocus)
 {
     OutlinerView* pOutlinerView = mpImpl->GetOutlinerView();
-    if (pOutlinerView != NULL)
+    if (pOutlinerView && mpTextObj)
     {
         pOutlinerView->SetOutputArea( Rectangle( Point(), Size(1, 1)));
         SetPaperSize( mpTextObj->GetLogicRect().GetSize() );