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(originalRowSpan >0)
			{
				if ( row.getContent( ) != this.row.getContent( ) )
				{
					return originalRowSpan -1;
				}
			}
			return originalRowSpan;
		}
 
		public Cell createCell( int colId, Row row )
		{
			Cell[] cells = this.row.cells;
			if ( colId >= 0 && colId < cells.length )
			{
				
				if ( !invalidFlags[colId] )
				{
					invalidFlags[colId] = true;
					return Cell.createCell( row.rowId, colId, getRowSpan( row,
							cells[colId].getRowSpan( ) ), cells[colId]
							.getColSpan( ), cells[colId].getContent( ) );
				}
			}
			return Cell.createCell( row.rowId, colId, 1, 1,
					cells[colId].getContent( ) );
		}
	}
}