Correct new CPP directives following rebase

Signed-off-by: Rod Chapman <[email protected]>

Author: rod-chapman

mlkem/ntt.c

@@ -727,3 +727,10 @@ void poly_invntt_tomont(poly *p)
   debug_assert_abs_bound(p, MLKEM_N, INVNTT_BOUND);
 }
 #endif /* MLKEM_USE_NATIVE_INTT */
+
+#else /* MLKEM_NATIVE_MULTILEVEL_BUILD_NO_SHARED */
+
+#define empty_cu_ntt MLKEM_NAMESPACE_K(empty_cu_ntt)
+int empty_cu_ntt;
+
+#endif /* MLKEM_NATIVE_MULTILEVEL_BUILD_NO_SHARED */

mlkem/ntt.h

@@ -70,3 +70,5 @@ __contract__(
   assigns(memory_slice(r, sizeof(poly)))
   ensures(array_abs_bound(r->coeffs, 0, MLKEM_N, INVNTT_BOUND))
 );
+
+#endif /* NTT_H */