Bugfix: NullPointerException

src/com/sheepit/client/standalone/swing/activity/Working.java

@@ -176,8 +176,10 @@ public class Working implements Activity {
 					InputStream is = new ByteArrayInputStream(data);
 					try {
 						BufferedImage image = ImageIO.read(is);
+						if (image != null) {
 							lastRender.setIcon(new ImageIcon(image));
 						}
+					}
 					catch (IOException e) {
 						System.out.println("Working::showLastRender() exception " + e);
 						e.printStackTrace();