Fix memory leak when entering duplicate entries into the dictionary.

libfdproto/dictionary.c

@@ -1860,6 +1860,8 @@ int fd_dict_new ( struct dictionary * dict, enum dict_object_type type, void * d
 		free(buf);
 	}
 error_free:
+	/* we can use destroy_object because this object is not part of the dictionary */
+	destroy_object_data(new);
 	free(new);
 	return ret;
 }