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
if ( ( dsi[iSeriesIndex].getDataType( ) & IConstants.NUMERICAL ) != IConstants.NUMERICAL )
							{
								throw new ChartException( ChartEnginePlugin.ID,
										ChartException.DATA_SET,
										"exception.percent.stacked.non.numerical",  
										Messages.getResourceBundle( rtc.getULocale( ) ) );
							}
						}
						
						iDataSetCount = dsi[iSeriesIndex].size( );
						dGroupMin = 0;
						dGroupMax = 0;
						if ( ax.isPercent( ) )
						{
							dAbsTotal = 0;
						}
						for ( int j = 0; j < iSeriesPerGroup; j++ )
						{
							se = (Series) alSeriesPerGroup.get( j );
							if ( j > 0 ) 
							{
								if ( dsi[iSeriesIndex] == null )
								{
									ds = se.getDataSet( ); 
									dsi[iSeriesIndex] = new DataSetIterator( ds );
									if ( ( dsi[iSeriesIndex].getDataType( ) & IConstants.NUMERICAL ) != IConstants.NUMERICAL )
									{
										throw new ChartException( ChartEnginePlugin.ID,
												ChartException.DATA_SET,
												"exception.percent.stacked.non.numerical",