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
return 0;
	}
	public int getCellWidth( int startColumn, int endColumn )
	{
		if ( layoutInfo != null )
		{
			return layoutInfo.getCellWidth( startColumn, endColumn );
		}
		return 0;
	}
	protected void verticalAlign( CellArea cell )
	{
		IContent content = cell.getContent( );
		if ( content == null )
		{
			return;
		}
		String verticalAlign = content.getComputedStyle( ).getVerticalAlign( );
		if ( CSSConstants.CSS_BOTTOM_VALUE.equals( verticalAlign )
				|| CSSConstants.CSS_MIDDLE_VALUE.equals( verticalAlign ) )
		{
			int totalHeight = 0;
			Iterator iter = cell.getChildren( );
			while ( iter.hasNext( ) )
			{
				AbstractArea child = (AbstractArea) iter.next( );
				totalHeight += child.getAllocatedHeight( );
			}
			int offset = cell.getContentHeight( ) - totalHeight;
			if ( offset > 0 )