Bug 18229 Walkback when closing ImageAnalyzer
Build 20020527 Win2k 1. Open the ImageAnalyzer SWT example. 2. Load an animated gif. 3. Hit 'animate' 4. Close the window. 5. Walkback
examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/imageanalyzer/ImageAnalyzer.java
imageCanvasGC.fillRectangle(
			clientArea.x,
			clientArea.y,
			clientArea.width,
			clientArea.height);
		if (image != null) {
			imageCanvas.redraw();
		}
	}
	
	/*
	 * Called when the ScaleX combo selection changes.
	 */
	void scaleX() {
		try {
			xscale = Float.parseFloat(scaleXCombo.getText());
		} catch (NumberFormatException e) {
			xscale = 1;
			scaleXCombo.select(scaleXCombo.indexOf("1"));
		}
		if (image != null) {
			resizeScrollBars();
			imageCanvas.redraw();
		}
	}
	
	/*
	 * Called when the ScaleY combo selection changes.
	 */
	void scaleY() {