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 null;
	}
	/**
	 * resolve width for table columns
	 * 
	 */
	private int[] resolveColumnWidth( )
	{
		int[] colWidth = new int[columnNumber];
		int colHasNoWidth = 0;
		int colSum = 0;
		for ( int j = 0; j < tableContent.getColumnCount( ); j++ )
		{
			IColumn column = (IColumn) tableContent.getColumn( j );
			int columnWidth = PropertyUtil
					.getDimensionValue( column.getWidth( ) );
			if ( columnWidth > 0 )
			{
				colWidth[j] = columnWidth;
				colSum += columnWidth;
			}
			else
			{
				colWidth[j] = -1;
				colHasNoWidth++;
			}
		}
		if ( colHasNoWidth == 0 )
		{