Bug 204245 Blank column on visibility column in excel[0300]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/buffermgr/TableContentLayout.java
if(cell!=null )
			{
				int rowSpan = cell.getRowSpan( );
				
				if(rowSpan<0 || rowSpan>1)
				{
					return true;
				}
			}
		}
		return false;
	}
	protected void ensureSize( int newRowBufferSize, int newColBufferSize )
	{
		if ( newRowBufferSize > rowBufferSize )
		{
			Row[] newRows = new Row[newRowBufferSize];
			if ( rows != null )
			{
				System.arraycopy( rows, 0, newRows, 0, rowCount );
			}
			for ( int rowId = rowBufferSize; rowId < newRowBufferSize; rowId++ )
			{
				Row row = new Row( rowId );
				Cell[] cells = new Cell[colBufferSize];
				for ( int colId = 0; colId < colBufferSize; colId++ )
				{
					cells[colId] = Cell.EMPTY_CELL;
				}
				row.cells = cells;