fix build failure in MSVC compiler

diff --git a/tornado/speedups.c b/tornado/speedups.c
index a643441c36180e544201081fbfaa2ba0d5602a6c..b714268ab4383a4e2e16f9a4cf25cc760ed67d15 100644 (file)
--- a/tornado/speedups.c
+++ b/tornado/speedups.c
@@ -1,5 +1,6 @@
 #define PY_SSIZE_T_CLEAN
 #include <Python.h>
+#include <stdint.h>
 
 static PyObject* websocket_mask(PyObject* self, PyObject* args) {
     const char* mask;