Bug 214197 [Regression] Auto scale does not work correctly [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/AutoScale.java
int[] ia = null;
			int iStep = asInteger( oStep );
			int iUnit = asInteger( oUnit );
			for ( int icu = 0; icu < iaCalendarUnits.length; icu++ )
			{
				if ( iUnit == iaCalendarUnits[icu] )
				{
					ia = iaCalendarDeltas[icu];
					if ( ia == null ) 
					{
						iStep++; 
						oStep = new Integer( iStep );
					}
					else
					
					{
						int i = 0, n = ia.length;
						for ( ; i < n; i++ )
						{
							if ( ia[i] == iStep )
							{
								break;
							}
						}
						if ( i == n - 1 ) 
						
						{
							ia = iaCalendarDeltas[icu + 1]; 
							
							oUnit = new Integer( iaCalendarUnits[icu + 1] );