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/PDFTableBandLM.java
this.executor = new DOMReportItemExecutor( content );
				this.executor.execute( );
			}
		}
	}
	protected boolean traverseChildren( )
	{
		if ( isFirst && groupLevel >= 0
				&& type == IBandContent.BAND_GROUP_FOOTER )
		{
			tbl.updateUnresolvedCell( groupLevel, false );
		}
		isFirst = false;
		boolean childBreak = super.traverseChildren( );
		if ( !childBreak && groupLevel >= 0
				&& type == IBandContent.BAND_GROUP_FOOTER )
		{
			tbl.updateUnresolvedCell( groupLevel, true );
		}
		return childBreak;
	}
	public int getCurrentBP( )
	{
		return parent.getCurrentBP( );
	}
	protected boolean submitRoot( boolean childBreak )
	{
		return true;
	}
	public int getCurrentIP( )