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/PDFTableLM.java
bottomMaxBorder = Math.max( resolveBottomBorder( cell.cell ),
					bottomMaxBorder );
			changed.add( cell.cell );
		}
		updateAllUnresolvedCellArea( );
		if ( lastRowArea != null )
		{
			Iterator iter = lastRowArea.getChildren( );
			while ( iter.hasNext( ) )
			{
				CellArea cell = (CellArea) iter.next( );
				if ( !changed.contains( cell ) )
				{
					bottomMaxBorder = Math.max( resolveBottomBorder( cell ),
							bottomMaxBorder );
					changed.add( cell );
				}
			}
		}
		if ( bottomMaxBorder > 0 )
		{
			
			for ( int i = 0; i < changed.size( ); i++ )
			{
				CellArea cell = (CellArea) changed.get( i );
				cell.setHeight( cell.getHeight( ) + bottomMaxBorder );
			}
			
			if ( lastRowArea != null )
			{