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/parser/EngineIRVisitor.java
* 
	 * @param cell
	 *            engine's styled cell element.
	 * @param handle
	 *            DE's styled cell element.
	 */
	protected void setupStyledElement( StyledElementDesign design,
			ReportElementHandle handle )
	{
		
		setupReportElement( design, handle );
		StyleDeclaration style = createPrivateStyle( handle,
				isContainer( handle ) );
		if ( style != null && !style.isEmpty( ) )
		{
			design.setStyleName( assignStyleName( style ) );
		}
	}
	public void visitCell( CellHandle handle )
	{
		
		CellDesign cell = new CellDesign( );
		setupStyledElement( cell, handle );
		
		SlotHandle contentSlot = handle.getContent( );
		for ( int i = 0; i < contentSlot.getCount( ); i++ )
		{
			apply( contentSlot.get( i ) );
			if ( currentElement != null )
			{