bpo-40268: Include explicitly pycore_interp.h (GH-19505)
pycore_pystate.h no longer includes pycore_interp.h:
it's now included explicitly in files accessing PyInterpreterState.
diff --git a/Objects/longobject.c b/Objects/longobject.c
index a66e1c4..a0bb6bc 100644
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -3,7 +3,8 @@
/* XXX The functional organization of this file is terrible */
#include "Python.h"
-#include "pycore_pystate.h" /* _Py_IsMainInterpreter() */
+#include "pycore_interp.h" // _PY_NSMALLPOSINTS
+#include "pycore_pystate.h" // _Py_IsMainInterpreter()
#include "longintrepr.h"
#include <float.h>