Bug 151202 [regression]Set default master page to item in cell will cause blank page
Description: Set default master page to item in cell will cause blank page Steps to reproduce: 1. New a report 2. Insert a grid(1*1) 3. Insert a label to grid cell 4. Select the label and set default master page to it 5. Preview in Web Viewer and pdf Expected result: No blank page, just one page for grid display. Actual result: A blank page before grid page
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/html/HTMLAbstractLM.java
style.setPageBreakAfter( IStyle.CSS_AUTO_VALUE );
			return true;
		}
		return false;
	}
	protected boolean hasMasterPageChanged( )
	{
		if ( content == null )
		{
			return false;
		}
		IStyle style = content.getStyle( );
		if ( style == null )
		{
			return false;
		}
		String newMasterPage = style.getMasterPage( );
		if ( newMasterPage == null || "".equals( newMasterPage ) ) 
		{
			return false;
		}
		String masterPage = context.getMasterPage( );
		if ( !newMasterPage.equalsIgnoreCase( masterPage ) )
		{
			
			PageSetupDesign pageSetup = content.getReportContent( ).getDesign( )
					.getPageSetup( );
			if ( pageSetup.getMasterPageCount( ) > 0 )
			{
				MasterPageDesign masterPageDesign = pageSetup