Fix a memory leak -- there's no need to INCREF() the result of
newreadlinesobject() in xreadlines().
diff --git a/Modules/xreadlinesmodule.c b/Modules/xreadlinesmodule.c
index 4cdef8a..db9e243 100644
--- a/Modules/xreadlinesmodule.c
+++ b/Modules/xreadlinesmodule.c
@@ -50,7 +50,6 @@
 	if (!PyArg_ParseTuple(args, "O:xreadlines", &file))
 		return NULL;
 	ret = newreadlinesobject(file);
-	Py_XINCREF(ret);
 	return (PyObject*)ret;
 }