Bug 176467 Wrong page break effect for spanned cell
When page break occurs on spanned cell, this cell on next page is lost, which cause incorrect page layout. Report design to reproduce the error is attached.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/cache/TableAreaLayout.java
int heightOfEmptyRow = 0;
		for ( int i = 0; i < columnNumber; i++ )
		{
			CellArea cell = row.getCell( start + i );
			if ( cell == null )
				continue;
			IStyle style = cell.getStyle( );
			int bottomBorderWidth = PropertyUtil.getDimensionValue( style
					.getProperty( StyleConstants.STYLE_BORDER_BOTTOM_WIDTH ) );
			int topBorderWidth = PropertyUtil.getDimensionValue( style
					.getProperty( StyleConstants.STYLE_BORDER_TOP_WIDTH ) );
			int heightOfEmptyCell = topBorderWidth + bottomBorderWidth;
			heightOfEmptyRow = Math.max( heightOfEmptyCell, heightOfEmptyRow );
		}
		return heightOfEmptyRow;
	}
	private boolean isEmptyRow( Row row )
	{
		for ( int i = 0; i < columnNumber; i++ )
		{
			CellArea cell = row.getCell( start + i );
			if ( cell != null && !isDropCell( cell )
					&& cell.getChildrenCount( ) > 0 )
			{
				return false;
			}
		}
		return true;
	}
	private boolean isDropCell( CellArea cell )