- The evaluation of the return value was not correct.

- There is still an issue with this kind of evaluation as there could be handles being 
  valid but have negative number. See Bug ID: 3515055 for details

git-svn-id: https://svn.code.sf.net/p/libusbjava/code/trunk@288 94ad28fe-ef68-46b1-9651-e7ae4fcf1c4c

java/test/ch/ntb/inf/libusbJava/test/TestLibUsbJava.java

@@ -120,7 +120,7 @@ public class TestLibUsbJava {
 
 		udev = LibusbJava.usb_open(dev);
 
-		if (udev != 0) {
+		if (udev <= 0) {
 			if (dev.getDescriptor().getIManufacturer() != 0) {
 				mfr = LibusbJava.usb_get_string_simple(udev, dev
 						.getDescriptor().getIManufacturer());