Bug 140620 Chart scripting errors are ignored
Write a chart with an invalid script, the execution simply ignores the script. This makes it difficult to debug scripting. The error message is also not precise and needs improvements.
chart/org.eclipse.birt.chart.device.extension/src/org/eclipse/birt/chart/device/image/JavaxImageIOWriter.java
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDeviceRenderer#setProperty(java.lang.String,
	 *      java.lang.Object)
	 */
	public void setProperty( String sProperty, Object oValue )
	{
		super.setProperty( sProperty, oValue );
		if ( sProperty.equals( IDeviceRenderer.EXPECTED_BOUNDS ) )
		{
			_bo = (Bounds) oValue;
		}
		else if ( sProperty.equals( IDeviceRenderer.CACHED_IMAGE ) )
		{
			_img = (Image) oValue;
		}
		else if ( sProperty.equals( IDeviceRenderer.FILE_IDENTIFIER ) )
		{
			_oOutputIdentifier = oValue;
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.imageio.event.IIOWriteWarningListener#warningOccurred(javax.imageio.ImageWriter,
	 *      int, java.lang.String)
	 */
	public void warningOccurred( ImageWriter source, int imageIndex,
			String warning )