Bug 178519 Problems in multi-rows header
Please see the attachments.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/cache/TableAreaLayout.java
}
		}
	}
	
	public void reset(TableArea table)
	{
		Iterator iter = rows.iterator( );
		while(iter.hasNext( ))
		{
			Row row = (Row)iter.next( );
			if(table.contains( row.getArea( ) ))
			{
				iter.remove( );
			}
		}
		
		rows.resetCursor( );
	}
	
	
	public void resolveDropCells(int dropValue)
	{
		/*
		 * 1. scan current row and calculate row height
		 * 2. update the height of drop cells
		 * 3. update the height of row
		 */
		assert(dropValue<0);
		
		if(rows.size( )==0 || !hasDropCell)