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
int rowSpan = cellContent.getRowSpan( );
						int colSpan = cellContent.getColSpan( );
						Cell newCell = Cell.createCell( row.rowId, cellId,
								rowSpan, colSpan, new CellContent( cellContent,
										null ) );
						row.cells[cellId] = newCell;
						for ( int i = cellId + 1; i < cellId + colSpan; i++ )
						{
							row.cells[i] = Cell.createSpanCell( row.rowId, i,
									newCell );
						}
					}
				}
			}
			formalized = true;
			rowHint = null;
		}
	}
	/**
	 * reset the table model.
	 * 
	 */
	public void reset( )
	{
		
		fillEmptyCells( 0, 0, rowBufferSize, colBufferSize );
		rowCount = 0;
		isRowHidden = false;
	}
	public int getRowCount( )