Bug 156969 [regression]Group header repeat doesn't work in Web Viewer.
Description: Group header repeat doesn't work in Web Viewer. Steps to reproduce: 1. New a data source and dataset, drag the dataset to Layout. 2. Add a group. 3. Set page break in the first data item in table detail row. 4. Preview in web viewer&#12290; Expected result: Group header is repeated in each page. Actual result: No group header repeat effect.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/ir/EngineIRReader.java
}
	}
	protected void readCell( DataInputStream in, CellDesign cell )
			throws IOException
	{
		while ( in.available( ) > 0 )
		{
			short fieldType = IOUtil.readShort( in );
			readCellField( in, cell, fieldType );
		}
	}
	protected void readCellField( DataInputStream in, CellDesign cell,
			short fieldType ) throws IOException
	{
		switch ( fieldType )
		{
			case FIELD_COLUMN :
				int column = IOUtil.readInt( in );
				cell.setColumn( column );
				break;
			case FIELD_COL_SPAN :
				int colSpan = IOUtil.readInt( in );
				cell.setColSpan( colSpan );
				break;
			case FIELD_ROW_SPAN :
				int rowSpan = IOUtil.readInt( in );
				cell.setRowSpan( rowSpan );
				break;
			case FIELD_DROP :
				String drop = IOUtil.readString( in );