[Serialization] Fix skipping of device.

src/device.cc

@@ -554,7 +554,7 @@ namespace hpp {
 
       archive_device_wrapper* adw = dynamic_cast<archive_device_wrapper*>(&ar);
       ar & BOOST_SERIALIZATION_NVP(name_);
-      bool written = (adw != NULL);
+      bool written = (adw == NULL);
       ar & BOOST_SERIALIZATION_NVP(written);
       if (written) {
         // AbstractDevice

src/humanoid-robot.cc

@@ -196,7 +196,7 @@ namespace hpp {
         (void) version;
         ar & boost::serialization::make_nvp("base", boost::serialization::base_object<Device>(*this));
         archive_device_wrapper* adw = dynamic_cast<archive_device_wrapper*>(&ar);
-        bool written = (adw != NULL);
+        bool written = (adw == NULL);
         ar & BOOST_SERIALIZATION_NVP(written);
         if (written) {
           ar & BOOST_SERIALIZATION_NVP(weakPtr_);