-STATIC void svu_validate_uv(pTHX_ SV *sv, size_t *offset, const char *desc) {
-#define svu_validate_uv(S, O, D) svu_validate_uv(aTHX_ (S), (O), (D))
+STATIC size_t svu_validate_uv(pTHX_ SV *sv, const char *desc) {
+#define svu_validate_uv(S, D) svu_validate_uv(aTHX_ (S), (D))