Need limited C API version 3.7 for PyImport_GetModule()

Author: vstinner

Modules/_testlimitedcapi/import.c

@@ -1,3 +1,9 @@
+// Need limited C API version 3.7 for PyImport_GetModule()
+#include "pyconfig.h"   // Py_GIL_DISABLED
+#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
+#  define Py_LIMITED_API 0x030d0000
+#endif
+
 #include "parts.h"
 #include "util.h"