Bug 213810 [2.2.2 acceptance] Error occurs when create a third axis.
description: Error occurs when create a third axis. build version: 2.2.2 v20071224-1008 steps to reproduce: 1. New a report. 2. New a datasource with sample DB and new a dataset with table payments. 3. New bar chart. 4. On Select Chart Type page, select Multi-Y Axis as More Axes. 5. On Select Data page, bind the dataset, select customernumber as Series1 of Axis1, create a secondary Axis, select PAYMENTDATE as Series1 of Axis2, create a third Axis. Expected result: The third Axis should be created correctly. Actual result: Error occurs: Unable to use a non-datetime data to render a datetime axis.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
iDSP = ps.getDataSetProcessor( sea[i].getClass( ) );
			ds = sea[i].getDataSet( );
			oV1 = iDSP.getMinimum( ds );
			oV2 = iDSP.getMaximum( ds );
			if ( ( iType & NUMERICAL ) == NUMERICAL )
			{
				try
				{
					if ( oV1 != null ) 
										
					{
						if ( oMin == null )
						{
							oMin = oV1;
						}
						else
						{
							final double dV1 = asDouble( oV1 ).doubleValue( );
							if ( Math.min( asDouble( oMin ).doubleValue( ), dV1 ) == dV1 )
							{
								oMin = oV1;
							}
						}
					}
					if ( oV2 != null ) 
										
					{
						if ( oMax == null )
						{
							oMax = oV2;