- set logger to final

- log level check corrected (null pointer exception)

git-svn-id: https://svn.code.sf.net/p/libusbjava/code/trunk@179 94ad28fe-ef68-46b1-9651-e7ae4fcf1c4c

java/src/ch/ntb/usb/USB.java

@@ -26,7 +26,7 @@ public class USB {
 	 */
 	public static int FULLSPEED_MAX_BULK_PACKET_SIZE = 64;
 
-	private static Logger logger = LogUtil.getLogger("ch.ntb.usb");
+	private static final Logger logger = LogUtil.getLogger("ch.ntb.usb");
 
 	private static LinkedList<Device> devices = new LinkedList<Device>();