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
}
				break;
			default :
				readReportItemField( in, grid, fieldType );
		}
	}
	protected void readColumn( DataInputStream in, ColumnDesign column )
			throws IOException
	{
		while ( in.available( ) > 0 )
		{
			short fieldType = IOUtil.readShort( in );
			readColumnField( in, column, fieldType );
		}
	}
	protected void readColumnField( DataInputStream in, ColumnDesign column,
			short fieldType ) throws IOException
	{
		switch ( fieldType )
		{
			case FIELD_WIDTH :
				DimensionType width = readDimension( in );
				column.setWidth( width );
				break;
			case FIELD_SUPPRESS_DUPLICATE :
				boolean suppressDuplicate = IOUtil.readBool( in );
				column.setSuppressDuplicate( suppressDuplicate );
				break;
			case FIELD_VISIBILITY :
				VisibilityDesign visibility = readVisibility( in );