Bug 157681 PDF Report Generated With Layout But No Data
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFAbstractLM.java
PDFAbstractLM p = parent;
		while ( p != null )
		{
			if ( !p.allowPageBreak( ) )
			{
				return false;
			}
			p = p.getParent( );
		}
		return true;
	}
	protected boolean needPageBreakBefore( )
	{
		if ( content == null )
		{
			return false;
		}
		boolean ret = hasMasterPageChanged( );
		IStyle style = content.getStyle( );
		String pageBreak = style.getPageBreakBefore( );
		if ( IStyle.CSS_ALWAYS_VALUE == pageBreak
				|| IStyle.CSS_LEFT_VALUE == pageBreak
				|| IStyle.CSS_RIGHT_VALUE == pageBreak)
		{
			
			return true;
		}
		return ret;
	}
	protected boolean needPageBreakAfter( )