win32 build fix

include/pybind/pytypes.h

@@ -229,7 +229,9 @@ public:
     PYBIND_OBJECT_DEFAULT(int_, object, PyLong_Check)
     PYBIND_OBJECT_DEFAULT(int_, object, PyLong_Check)
     int_(int value) : object(PyLong_FromLong((long) value), false) { }
     int_(int value) : object(PyLong_FromLong((long) value), false) { }
     int_(size_t value) : object(PyLong_FromSize_t(value), false) { }
     int_(size_t value) : object(PyLong_FromSize_t(value), false) { }
+#if !defined(WIN32) || defined(_WIN64)
     int_(ssize_t value) : object(PyLong_FromSsize_t(value), false) { }
     int_(ssize_t value) : object(PyLong_FromSsize_t(value), false) { }
+#endif
     operator int() const { return (int) PyLong_AsLong(m_ptr); }
     operator int() const { return (int) PyLong_AsLong(m_ptr); }
 };
 };