Bug 172092 [regression][automation] __maxrows=1 url pattern did not work
steps to reproduce: - preview report using the following url fragment, preview?__report=report/regression_142673.rptdesign&__designer=true&__maxrows=1 expected behavior: - only one data row is displayed actual behavior/: - all data rows are displayed
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/EngineTask.java
if ( runnable == null )
		{
			return false;
		}
		
		usingParameterValues( );
		
		return new ParameterVisitor( ) {
			boolean visitScalarParameter( ScalarParameterHandle param,
					Object value )
			{
				return validateScalarParameter( param );
			}
			boolean visitParameterGroup( ParameterGroupHandle group,
					Object value )
			{
				return visitParametersInGroup( group, value );
			}
		}.visit( (ReportDesignHandle) runnable.getDesignHandle( ), null );
	}
	/**
	 * validate whether the parameter value is a valid value for the parameter
	 * 
	 * @param p
	 *            the parameter to be verified
	 * @param paramValue
	 *            the value for the parameter
	 * @return true if the given parameter value is valid; false otherwise
	 */
	private boolean validateScalarParameter( ScalarParameterHandle paramHandle )