Issue #10517: After fork(), reinitialize the TLS used by the PyGILState_*
APIs, to avoid a crash with the pthread implementation in RHEL 5.  Patch
by Charles-François Natali.
diff --git a/Include/pystate.h b/Include/pystate.h
index 50245c2..9f876e9 100644
--- a/Include/pystate.h
+++ b/Include/pystate.h
@@ -131,6 +131,7 @@
 PyAPI_FUNC(void) PyThreadState_Delete(PyThreadState *);
 #ifdef WITH_THREAD
 PyAPI_FUNC(void) PyThreadState_DeleteCurrent(void);
+PyAPI_FUNC(void) _PyGILState_Reinit(void);
 #endif
 
 PyAPI_FUNC(PyThreadState *) PyThreadState_Get(void);