From 7874dcf3488cb4f13f84a20f28ce55c07396c8c9 Mon Sep 17 00:00:00 2001
From: Klaus Reimer <k@ailis.de>
Date: Mon, 15 Apr 2013 22:52:54 +0200
Subject: [PATCH] Properly check for null equality

---
 src/main/java/de/ailis/usb4java/DeviceId.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/de/ailis/usb4java/DeviceId.java b/src/main/java/de/ailis/usb4java/DeviceId.java
index 59a5e68..98f908b 100644
--- a/src/main/java/de/ailis/usb4java/DeviceId.java
+++ b/src/main/java/de/ailis/usb4java/DeviceId.java
@@ -144,8 +144,8 @@ final class DeviceId implements Serializable
      */
     public static boolean equals(final DeviceId a, final DeviceId b)
     {
-        if (a == b) return true;
-        if (a == null) return false;
+        if (a == null && b == null) return true;
+        if (a == null || b == null) return false;
         return a.equals(b);
     }
 }