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 readTableBandField( DataInputStream in,
			TableBandDesign tableBand, short fieldType ) throws IOException
	{
		readBandField( in, tableBand, fieldType );
	}
	protected void readGrid( DataInputStream in, GridItemDesign grid )
			throws IOException
	{
		while ( in.available( ) > 0 )
		{
			short fieldType = IOUtil.readShort( in );
			readGridField( in, grid, fieldType );
		}
	}
	protected void readGridField( DataInputStream in, GridItemDesign grid,
			short fieldType ) throws IOException
	{
		switch ( fieldType )
		{
			case FIELD_COLUMNS :
				int columnCount = IOUtil.readInt( in );
				for ( int i = 0; i < columnCount; i++ )
				{
					byte[] bytes = IOUtil.readBytes( in );
					ColumnDesign column = new ColumnDesign( );
					readColumn( new DataInputStream( new ByteArrayInputStream(
							bytes ) ), column );
					grid.addColumn( column );