Merge branch '0.23.x'

Conflicts:
	CHANGES.rst
	Cython/Shadow.py

CHANGES.rst

@@ -59,12 +59,14 @@ Other changes
 -------------
 
 
-0.23.4 (2015-??-??)
+0.23.4 (2015-10-10)
 ===================
 
 Bugs fixed
 ----------
 
+* Memory leak when calling Python functions in PyPy.
+
 * Compilation problem with MSVC in C99-ish mode.
 
 * Warning about unused values in a helper macro.

Cython/Utility/ObjectHandling.c

@@ -1441,8 +1441,12 @@ static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObjec
 }
 #else
 static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-    PyObject* args = PyTuple_Pack(1, arg);
-    return (likely(args)) ? __Pyx_PyObject_Call(func, args, NULL) : NULL;
+    PyObject *result;
+    PyObject *args = PyTuple_Pack(1, arg);
+    if (unlikely(!args)) return NULL;
+    result = __Pyx_PyObject_Call(func, args, NULL);
+    Py_DECREF(args);
+    return result;
 }
 #endif