Fixed refleak in _testcapi.test_s_code.
diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index 2e68a66..7c28538 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -504,6 +504,7 @@
     if (PyArg_ParseTuple(tuple, "z:test_s_code2", &value) < 0)
     	return NULL;
 
+    Py_DECREF(tuple);
     Py_RETURN_NONE;
 }