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
else
						{
							final CDateTime cdtV1 = asDateTime( oV1 );
							final CDateTime cdtMin = asDateTime( oMin );
							if ( cdtV1.before( cdtMin ) )
							{
								oMin = cdtV1;
							}
						}
					}
					if ( oV2 != null ) 
										
					{
						if ( oMax == null )
						{
							oMax = oV2;
						}
						else
						{
							final CDateTime cdtV2 = asDateTime( oV2 );
							final CDateTime cdtMax = asDateTime( oMax );
							if ( cdtV2.after( cdtMax ) )
							{
								oMax = cdtV2;
							}
						}
					}
				}
				catch ( ClassCastException ex )
				{