grass.script: Fix test_append_node_pid test using legalize_vector_name

Author: echoix

python/grass/script/testsuite/test_names.py

@@ -17,7 +17,9 @@ def test_append_node_pid(self):
         self.assertIn(base_name, full_name)
         self.assertGreater(len(full_name), len(base_name))
         self.assertIn(str(os.getpid()), full_name)
-        self.assertIn(utils.legalize_vector_name(platform.node()), full_name)
+        self.assertIn(
+            utils.legalize_vector_name(platform.node(), fallback_prefix=""), full_name
+        )
         self.assertTrue(legal_name(full_name))
         # TODO: It should be also a valid vector name
         # but we don't have a function for that (same for all)