Simplify and speedup uses of Py_BuildValue():
* Py_BuildValue("(OOO)",a,b,c) --> PyTuple_Pack(3,a,b,c)
* Py_BuildValue("()",a) --> PyTuple_New(0)
* Py_BuildValue("O", a) --> Py_INCREF(a)
diff --git a/Modules/cStringIO.c b/Modules/cStringIO.c
index ac84ab0..ee11878 100644
--- a/Modules/cStringIO.c
+++ b/Modules/cStringIO.c
@@ -439,7 +439,7 @@
tmp = PyObject_CallFunction(joiner, "O", args);
UNLESS (tmp) return NULL;
- args = Py_BuildValue("(O)", tmp);
+ args = PyTuple_Pack(1, tmp);
Py_DECREF(tmp);
UNLESS (args) return NULL;