guard against missing table layout

Change-Id: I4bc7a7283f63124ccb50957ea64791644e01e267

lotuswordpro/source/filter/lwpcelllayout.cxx

@@ -696,6 +696,9 @@ void LwpConnectedCellLayout::SetCellMap()
 {
     // this function is called from LwpTableLayout, so it can't be NULL
     LwpTableLayout * pTableLayout = GetTableLayout();
+    if (!pTableLayout)
+        return;
+
     sal_uInt16 nRowSpan = m_nRealrowspan;
 
     for (sal_uInt16 iLoop = 0; iLoop < nRowSpan; iLoop ++)

lotuswordpro/source/filter/lwprowlayout.cxx

@@ -363,11 +363,14 @@ sal_uInt16 LwpRowLayout::GetCurMaxSpannedRows(sal_uInt8 nStartCol,sal_uInt8 nEnd
  */
 void LwpRowLayout::ConvertCommonRow(XFTable* pXFTable,sal_uInt8 nStartCol,sal_uInt8 nEndCol)
 {
+    LwpTableLayout* pTableLayout = GetParentTableLayout();
+    if (!pTableLayout)
+        return;
+
     XFRow* pRow = new XFRow;
     pRow->SetStyleName(m_StyleName);
 
     XFCell * pCell = nullptr;
-    LwpTableLayout* pTableLayout = GetParentTableLayout();
     LwpTable* pTable = pTableLayout->GetTable();
     sal_uInt8 nCellStartCol,nCellEndCol;