Bug 152560 PDF doesn't display bottom Border in inner group footer properly
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFTableLM.java
style.setProperty( StyleConstants.STYLE_MARGIN_RIGHT,
					IStyle.NUMBER_0 );
			marginWidth = 0;
		}
		tableWidth = tableWidth - marginWidth;
		int delta = tableWidth - colSum;
		if ( colHasNoWidth == columnNumber ) 
		{
			int dis = delta / columnNumber;
			if ( delta != 0 )
			{
				for ( int i = 0; i < columnNumber; i++ )
				{
					colWidth[i] = dis;
				}
			}
		}
		else
		{
			if ( delta > 0 )
			{
				int leftColumnWidth = delta / colHasNoWidth;
				for ( int i = 0; i < columnNumber; i++ )
				{
					if ( colWidth[i] < 0 )
					{
						colWidth[i] = leftColumnWidth;
					}
				}
			}