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
{
		CellArea cell;
		int leftHeight;
		int rowSpan;
		public DropCellInfo( CellArea cell, int rowSpan )
		{
			this.cell = cell;
			this.rowSpan = rowSpan;
			this.leftHeight = cell.getHeight( );
		}
		public DropCellInfo( CellArea cell, int height, int rowSpan )
		{
			this.cell = cell;
			this.rowSpan = rowSpan;
			this.leftHeight = height;
		}
	}
	protected void repeatHeader( )
	{
		if ( isFirst )