Bug 200812 Issue when remove one separator setting in viewer.property[0002]
Description: Issue when remove one separator setting in viewer.property Build number:2.2.1.v200708220927 Steps to reproduce: 1. Deploy birt. 2. Open viewer.properties under WEB-INF folder. 3. Delete "viewer.sep.0=," line 4. Start server. 5. Preview report. 6. Export Data, select columns and select "Comma(,)", click OK. Expected result: Comma(,) isn't in the separator list. Actual result: Nothing happened after step6 and no error logs. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
return true;
		return false;
	}
	/**
	 * Returns action name
	 * 
	 * @param request
	 * @return
	 */
	public static String getAction( HttpServletRequest request )
	{
		return getParameter( request, PARAM_ACTION );
	}
	/**
	 * Returns the dpi setting from http request
	 * 
	 * @param request
	 * @return
	 */
	public static Number getDpi( HttpServletRequest request )
	{
		String dpi = getParameter( request, PARAM_DPI );
		if ( dpi == null || dpi.trim( ).length( ) <= 0 )
			return null;
		return Integer.valueOf( dpi );
	}
	/**
	 * Returns the separator String
	 * 
	 * @param request