It is safer to uncomment these checks in the postithelper

Change-Id: I84d96224dbe51ff25fcb6d96e0be9a8dff89b0a1
Reviewed-on: https://gerrit.libreoffice.org/2567Reviewed-by: Bosdonnat Cedric <cedric.bosdonnat@free.fr>
Tested-by: Bosdonnat Cedric <cedric.bosdonnat@free.fr>

sw/source/core/fields/postithelper.cxx

@@ -165,16 +165,16 @@ unsigned long SwPostItHelper::getPageInfo( SwRect& rPageFrm, const SwRootFrm* pR
 SwPosition SwAnnotationItem::GetAnchorPosition() const
 {
     SwTxtFld* pFld = pFmtFld->GetTxtFld();
-    //if( pFld )
-    //{
+    if( pFld )
+    {
         SwTxtNode* pTNd = pFld->GetpTxtNode();
-    //  if( pTNd )
-    //  {
+        if( pTNd )
+        {
             SwPosition aPos( *pTNd );
             aPos.nContent.Assign( pTNd, *pFld->GetStart() );
             return aPos;
-    //  }
-    //}
+        }
+    }
 }
 
 bool SwAnnotationItem::UseElement()