add test for issue #27: getaddrinfo improperly handles case where socktype or...

add test for issue #27: getaddrinfo improperly handles case where socktype or proto is 0. Thanks to Randall Leeds.

greentest/test__socket_dns.py

@@ -41,6 +41,7 @@ class TestCase(greentest.TestCase):
     PORTS = [80, 0, 53]
     getaddrinfo_args = [(),
                         (AF_UNSPEC, ),
+                        (AF_UNSPEC, SOCK_STREAM, 0, 0),
                         (AF_INET, SOCK_STREAM, ),
                         (AF_UNSPEC, SOCK_DGRAM, ),
                         (AF_INET, SOCK_RAW, ),