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
double dPower = ( Math.log( dStep ) / LOG_10 );
					if ( dPower < 0 )
					{
						dPower = Math.floor( dPower );
					}
					dPower = Math.pow( 10, dPower );
					dStep /= dPower;
					dStep = Math.round( dStep );
					int n = iaLinearDeltas.length;
					int i = 0;
					for ( ; i < n; i++ )
					{
						if ( dStep == iaLinearDeltas[i] )
						{
							if ( i < n - 1 )
							{
								dStep = iaLinearDeltas[i + 1] * dPower;
								if ( dStep > 1 )
								{
									dStep = Math.round( dStep );
								}
							}
							else
							{
								dPower *= 20;
								dStep = iaLinearDeltas[0] * dPower;
								if ( dStep > 1 )
								{
									dStep = Math.round( dStep );
								}