Bug 181361 Exception is thrown out in Chart builder when you set all null values for Value Series [0001]
Description: Exception is thrown out in Chart builder when you set all null values for Value Series. Build number: 2.2.0.v20070405-0630 Steps to reproduce: 1. Create a Bar Chart, set all null value data for Value Series. Expected result: No exception is thrown out. Actual result: Exception is thrown out (See the screenshot). Error log: N/A
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
Series se;
		DataSet ds;
		Object oV1, oV2, oMin = null, oMax = null;
		PluginSettings ps = PluginSettings.instance( );
		IDataSetProcessor iDSP = null;
		
		boolean bAnyStacked = false;
		for ( int i = 0; i < iSeriesCount; i++ )
		{
			if ( sea[i].isStacked( ) )
			{
				if ( sea[i].canBeStacked( ) )
				{
					bAnyStacked = true;
					continue;
				}
				else
				{
					throw new IllegalArgumentException( MessageFormat.format( Messages.getResourceBundle( rtc.getULocale( ) )
							.getString( "exception.unstackable.is.stacked" ), 
							new Object[]{
								sea[i]
							} ) );
				}
			}
			iDSP = ps.getDataSetProcessor( sea[i].getClass( ) );
			ds = sea[i].getDataSet( );
			oV1 = iDSP.getMinimum( ds );
			oV2 = iDSP.getMaximum( ds );
			if ( ( iType & NUMERICAL ) == NUMERICAL )