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.device.swt/src/org/eclipse/birt/chart/device/swt/SwtRendererImpl.java
/***********************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http:www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * Actuate Corporation - initial API and implementation
 ***********************************************************************/
package org.eclipse.birt.chart.device.swt;
import java.io.ByteArrayInputStream;