Fix test failure in test_cmd_line by initializing the hash secret at the earliest point.
diff --git a/Include/pygetopt.h b/Include/pygetopt.h
index 4de8c00..425c7dd 100644
--- a/Include/pygetopt.h
+++ b/Include/pygetopt.h
@@ -9,6 +9,8 @@
 PyAPI_DATA(int) _PyOS_opterr;
 PyAPI_DATA(int) _PyOS_optind;
 PyAPI_DATA(wchar_t *) _PyOS_optarg;
+
+PyAPI_FUNC(void) _PyOS_ResetGetOpt(void);
 #endif
 
 PyAPI_FUNC(int) _PyOS_GetOpt(int argc, wchar_t **argv, wchar_t *optstring);