Bug 176582 "Show Lines as Curves" does not work correctly for Area Chart [0001]
Description: "Show Lines as Curves" does not work correctly for Area Chart. Build number: 2.2.0.v20070307-1128 Steps to reproduce: 1. New a Area Chart. 2. In "Format Chart" tab, select Series->Value (Y) Series, tick and untick "Show Lines as Curves" checkbox. Expected result: Null value point e is treated the same when tick and untick "Show Lines as Curves" checkbox. Actual result: Null value point e is treated differently (see the screenshot). Error log: N/A
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
{
					sb.append( c );
					c = '&';
					sb.append( URLValueImpl.encode( uv.getBaseParameterName( ) ) );
					sb.append( '=' );
					sb.append( URLValueImpl.encode( dph.getBaseDisplayValue( ) ) );
				}
				if ( uv.getValueParameterName( ) != null
						&& uv.getValueParameterName( ).length( ) > 0 )
				{
					sb.append( c );
					c = '&';
					sb.append( URLValueImpl.encode( uv.getValueParameterName( ) ) );
					sb.append( '=' );
					sb.append( URLValueImpl.encode( dph.getOrthogonalDisplayValue( ) ) );
				}
				if ( uv.getSeriesParameterName( ) != null
						&& uv.getSeriesParameterName( ).length( ) > 0 )
				{
					sb.append( c );
					c = '&';
					sb.append( URLValueImpl.encode( uv.getSeriesParameterName( ) ) );
					sb.append( '=' );
					sb.append( URLValueImpl.encode( dph.getSeriesDisplayValue( ) ) );
				}
				uv.setBaseUrl( sb.toString( ) );
			}
		}
	}
	/**