Bug 147676 [regression]Visibility set in the first col will affect the second col
Description: Visibility set in the first col will affect the second col Steps to reproduce: 1. Insert a grid(3*3), insert contents to each cell. 2.Set the first col to hide all in visibility and preview Expected result: Only the first col is hidden. Actual result: The second col is hidden, too. If you set the second col in step2, the third col will disappear.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFAbstractLM.java
public void cancel( )
	{
		if ( executor != null && status != STATUS_END )
		{
			cancelChildren( );
			executor.close( );
		}
	}
	protected void execute( IReportItemExecutor executor, IContent content )
	{
		if ( executor != null )
		{
			while ( executor.hasNextChild( ) )
			{
				IReportItemExecutor childExecutor = executor.getNextChild( );
				if ( childExecutor != null )
				{
					IContent childContent = childExecutor.execute( );
					content.getChildren( ).add( childContent );
					execute( childExecutor, childContent );
					childExecutor.close( );
				}
			}
		}
	}
	public void setEmitter( IContentEmitter emitter )
	{
		this.emitter = emitter;
	}
	protected class ReportStackingExecutor implements IReportItemExecutor