Bug 180190 Some unnecessary error log is shown in charting
When a chart in a report has no data, or there is no SWT interactivity notifier hooked to the engine, an warning or error are logged. Those are normal conditions of execution and should only log with a INFO level.
chart/org.eclipse.birt.chart.reportitem/src/org/eclipse/birt/chart/reportitem/ChartReportItemPresentationImpl.java
ReportItemPresentationBase
{
	private InputStream fis = null;
	private String imageMap = null;
	private String sExtension = null;
	private String sSupportedFormats = null;
	private String outputFormat = null;
	private Chart cm = null;
	private IDeviceRenderer idr = null;
	private ExtendedItemHandle handle;
	private RunTimeContext rtc = null;
	private List registeredDevices = null;
	private static ILogger logger = Logger.getLogger( "org.eclipse.birt.chart.reportitem/trace" ); 
	/**
	 * The constructor.
	 */
	public ChartReportItemPresentationImpl( )
	{
		registeredDevices = new ArrayList( );
		try
		{
			String[][] formats = PluginSettings.instance( )
					.getRegisteredOutputFormats( );
			for ( int i = 0; i < formats.length; i++ )
			{
				registeredDevices.add( formats[i][0] );
			}