Fixed compilation on unix for 0.10.x, 0.12.x and 4.0.0

Author: christkv

test/functional/kerberos_tests.js

@@ -26,6 +26,7 @@ exports['Should Correctly Authenticate using kerberos with MongoClient'] = {
 
     // Let's write the actual connection code
     MongoClient.connect(format("mongodb://%s@%s/kerberos?authMechanism=GSSAPI&gssapiServiceName=mongodb&maxPoolSize=1", urlEncodedPrincipal, server), function(err, db) {
+      console.dir(err)
       test.equal(null, err);
       test.ok(db != null);