Remove incorrect pass by reference

We incorrectly passed a pointer by reference, causing GPS export from
modem to fail.

Author: kristrev

metadata_input_nl_zmq_common.c

@@ -519,7 +519,6 @@ struct md_gps_event* handle_gps_event(struct json_object *json_obj)
     default:
         free(gps_event);
         return NULL;
-        break;
     }
 
     return gps_event;

metadata_input_zeromq.c

@@ -209,7 +209,7 @@ static void md_input_zeromq_handle_gps_event(struct md_input_zeromq *miz,
     if (!event)
         return;
 
-    mde_publish_event_obj(miz->parent, (struct md_event *) &event);
+    mde_publish_event_obj(miz->parent, (struct md_event *) event);
     free(event);
 }