Bug 203709 NullPointerException in TableAreaLayout
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/cache/TableAreaLayout.java
for(int i=startCol; i<=endCol; i++)
		{
			if(cells[i-startCol]==null)
			{
				ICellContent cellContent = null;
				CellArea ca= unresolvedRow.getCell( i );
				if(ca!=null)
				{
					ICellContent cc = (ICellContent)ca.getContent( );
					cellContent = new ClonedCellContent(cc, getRowSpan(
							(IRowContent) row.getContent(), ca,
							unresolvedRow.row));
				
					
					
					int startColumn = cellContent.getColumn( );
					int endColumn = cellContent.getColSpan( ) + startColumn;
					CellArea emptyCell = AreaFactory
							.createCellArea( cellContent );
					emptyCell.setRowSpan( cellContent.getRowSpan( ) );
					resolveBorderConflict( emptyCell, true );
					emptyCell.setWidth( getCellWidth( startColumn, endColumn ) );
					emptyCell.setPosition( layoutInfo.getXPosition( i ), 0 );
					emptyCell.setHeight( row.getHeight( ) );
					row.addChild( emptyCell );
				}
			}
		}
	}