Bug 315050 [Automation][Regression]Image size is different from golden file when preview as xls
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/layout/ExcelLayoutEngine.java
Type blankType = Type.VERTICAL;
					if ( upstair.isBlank( ) )
					{
						BlankData blankData = (BlankData) upstair;
						if ( blankData.getType( ) == Type.VERTICAL )
						{
							upstair
									.setRowSpan( upstair.getRowSpan( )
											+ rowspan );
							if ( !isInContainer( blankData, rowContainer ) )
							{
								upstair.decreasRowSpanInDesign( );
							}
						}
						blankType = blankData.getType( );
					}
					else
					{
						upstair.setRowSpan( upstair.getRowSpan( ) + rowspan );
						if ( !isInContainer( upstair, rowContainer ) )
						{
							upstair.decreasRowSpanInDesign( );
						}
					}
					int rowIndex = upstair.getRowIndex( );
					for ( int p = 1; p <= rowspan; p++ )
					{
						BlankData blank = new BlankData( upstair );
						blank.setRowIndex( rowIndex + p );
						blank.setType( blankType );