Specialized hashCode(), includes test.

src/net/java/sip/communicator/impl/protocol/irc/ChatRoomMemberIrcImpl.java

@@ -225,11 +225,8 @@ public int hashCode()
     {
         final int prime = 31;
         int result = 1;
-        result =
-            prime * result + ((contactID == null) ? 0 : contactID.hashCode());
-        result =
-            prime * result
-                + ((parentProvider == null) ? 0 : parentProvider.hashCode());
+        result = prime * result + contactID.hashCode();
+        result = prime * result + parentProvider.hashCode();
         return result;
     }
 

test/net/java/sip/communicator/impl/protocol/irc/ChatRoomMemberIrcImplTest.java

@@ -300,4 +300,15 @@ public void testEqualsTrue()
             "susy", ChatRoomMemberRole.SILENT_MEMBER);
         Assert.assertTrue(member1.equals(member2));
     }
+    
+    public void testHashcodeNotFailing()
+    {
+        ChatRoom chatroom = EasyMock.createMock(ChatRoom.class);
+        ProtocolProviderService provider =
+            EasyMock.createMock(ProtocolProviderService.class);
+        ChatRoomMemberIrcImpl member =
+            new ChatRoomMemberIrcImpl(provider, chatroom, "ET",
+                ChatRoomMemberRole.ADMINISTRATOR);
+        member.hashCode();
+    }
 }