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
IColumn column = tableContent.getColumn( i );
			if ( isColumnHidden( column ) )
			{
				colWidth[i] = 0;
			}
		}
		return colWidth;
	}
	private boolean isColumnHidden( IColumn column )
	{
		String format = emitter.getOutputFormat( ).toUpperCase( );
		String formats = column.getVisibleFormat( );
		if ( formats != null
				&& formats.length( ) > 0
				&& ( formats.indexOf( format ) >= 0 || formats.toUpperCase( )
						.indexOf( BIRTConstants.BIRT_ALL_VALUE.toUpperCase( ) ) >= 0 ) )
		{
			return true;
		}
		return false;
	}
	public boolean addArea( IArea area )
	{
		assert ( area instanceof RowArea );
		RowArea row = (RowArea) area;
		lastRowArea = row;
		return super.addArea( area );
	}
	protected void updateAllUnresolvedCellArea( )
	{