Bug 176794 Border in pdf is overlap[00]
Details: Border in pdf is overlap[00] Step: Please see the attached report and pdf. Actual result: The border is overlap.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/cache/TableAreaLayout.java
* 1. create row wrapper, and add it to rows
		 */
		Row lastRow = (Row)rows.getCurrent( );
		Row row = new Row(rowArea, start, columnNumber, finished );
		for(int i=0; i<columnNumber; i++)
		{
			CellArea lastCell = null;
			if(lastRow!=null)
			{
				lastCell = lastRow.getCell( start + i );
			}
			CellArea cell = row.getCell( start + i );
			if(lastCell!=null &&(lastCell.getRowSpan( )>1 || lastCell.getRowSpan( )<0))
			{
				if(cell==null)
				{
					DummyCell dummyCell = null;
					if(lastCell instanceof DummyCell)
					{
						DummyCell refDummy = ((DummyCell)lastCell);
						dummyCell = new DummyCell(refDummy.getCell( ));
						if(lastCell.getRowSpan()>0)
						{
							dummyCell.setRowSpan( lastCell.getRowSpan( )-1 );
						}
						else
						{
							dummyCell.setRowSpan( lastCell.getRowSpan( ) );
						}
						dummyCell.setHeight( refDummy.getHeight( ) );