Bug 191005 PDF preview hangs up with attached xtab.[1102]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFLineAreaLM.java
{
		updateLine( );
		align( false );
		boolean ret = true;
		if(root.getChildrenCount( )>0)
		{
			ret = parent.addArea( root, false, false );
		}
		lineFinished = true;
		if ( ret )
		{
			initialize( );
			last = null;
			return true;
		}
		else
		{
			last = root;
			return false;
		}
	}
	protected void closeLayout( )
	{
		updateLine( );
		align( true );
	}
		 
	public boolean addArea( IArea area, boolean keepWithPrevious, boolean keepWithNext )
	{
		submit((AbstractArea)area);