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.swt/src/org/eclipse/birt/chart/device/swt/SwtRendererImpl.java
jc.removeMouseMoveListener( _eh );
						jc.removeMouseTrackListener( _eh );
						jc.removeKeyListener( _eh );
					}
					_eh.dispose( );
					_eh = null;
				}
			}
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDeviceRenderer#setProperty(java.lang.String,
	 *      java.lang.Object)
	 */
	public final void setProperty( final String sProperty, final Object oValue )
	{
		if ( sProperty.equals( IDeviceRenderer.UPDATE_NOTIFIER ) )
		{
			_iun = (IUpdateNotifier) oValue;
			cleanUpTriggers( );
			Object obj = _iun.peerInstance( );
			if ( obj instanceof Composite )
			{
				Composite jc = (Composite) obj;
				if ( _eh != null )
				{