Merge 3.5 (INVALID_SOCKET)
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index f8d39f6..d21d18f 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -2579,8 +2579,8 @@
     int res;
 
     fd = s->sock_fd;
-    if (fd != -1) {
-        s->sock_fd = -1;
+    if (fd != INVALID_SOCKET) {
+        s->sock_fd = INVALID_SOCKET;
 
         /* We do not want to retry upon EINTR: see
            http://lwn.net/Articles/576478/ and
@@ -2606,7 +2606,7 @@
 sock_detach(PySocketSockObject *s)
 {
     SOCKET_T fd = s->sock_fd;
-    s->sock_fd = -1;
+    s->sock_fd = INVALID_SOCKET;
     return PyLong_FromSocket_t(fd);
 }
 
@@ -4202,7 +4202,7 @@
     /* Save the current exception, if any. */
     PyErr_Fetch(&error_type, &error_value, &error_traceback);
 
-    if (s->sock_fd != -1) {
+    if (s->sock_fd != INVALID_SOCKET) {
         if (PyErr_ResourceWarning((PyObject *)s, 1, "unclosed %R", s)) {
             /* Spurious errors can appear at shutdown */
             if (PyErr_ExceptionMatches(PyExc_Warning)) {
@@ -4215,7 +4215,7 @@
            socket.getsockname(). If the socket is closed before, socket
            methods fails with the EBADF error. */
         fd = s->sock_fd;
-        s->sock_fd = -1;
+        s->sock_fd = INVALID_SOCKET;
 
         /* We do not want to retry upon EINTR: see sock_close() */
         Py_BEGIN_ALLOW_THREADS
@@ -4275,7 +4275,7 @@
 
     new = type->tp_alloc(type, 0);
     if (new != NULL) {
-        ((PySocketSockObject *)new)->sock_fd = -1;
+        ((PySocketSockObject *)new)->sock_fd = INVALID_SOCKET;
         ((PySocketSockObject *)new)->sock_timeout = _PyTime_FromSeconds(-1);
         ((PySocketSockObject *)new)->errorhandler = &set_error;
     }