As discussed on python-dev, changed builtin.zip() to handle zero arguments
by returning an empty list instead of raising a TypeError.
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 49fcc09..fb92478 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -1916,11 +1916,9 @@
 	PyObject *itlist;  /* tuple of iterators */
 	int len;	   /* guess at result length */
 
-	if (itemsize < 1) {
-		PyErr_SetString(PyExc_TypeError,
-				"zip() requires at least one sequence");
-		return NULL;
-	}
+	if (itemsize == 0)
+		return PyList_New(0);
+
 	/* args must be a tuple */
 	assert(PyTuple_Check(args));