AWTGLCanvas: Synchronize paintGL() to avoid destroyContext while painting

src/java/org/lwjgl/opengl/AWTGLCanvas.java

@@ -283,6 +283,7 @@ public class AWTGLCanvas extends Canvas implements Drawable, ComponentListener,
 	 * be overridden to do GL operations.
 	 */
 	public final void paint(Graphics g) {
+		synchronized (SYNC_LOCK) {
 			try {
 				if (peer_info == null) {
 					this.peer_info = implementation.createPeerInfo(this, pixel_format);
@@ -322,6 +323,7 @@ public class AWTGLCanvas extends Canvas implements Drawable, ComponentListener,
 				throw new RuntimeException(e);
 			}
 		}
+	}
 
 	/**
 	 * override update to avoid clearing