Fix compiler warning

JelleZijlstra · JelleZijlstra · commit c3d6464aae2c · 2023-04-29T11:44:49.000-07:00
diff --git a/Modules/_typingmodule.c b/Modules/_typingmodule.c
@@ -1,6 +1,8 @@
 /* typing accelerator C extension: _typing module. */
 
+#ifndef Py_BUILD_CORE
 #define Py_BUILD_CORE
+#endif
 
 #include "Python.h"
 #include "internal/pycore_interp.h"
