src: add check for Bignum in GroupOrderSize · nodejs/node@b240ca6

nodejs

Original file line number	Diff line number	Diff line change
`@@ -918,6 +918,7 @@ size_t GroupOrderSize(const EVPKeyPointer& key) {`
`918`	`918`	`const EC_KEY* ec = key;`
`919`	`919`	`CHECK_NOT_NULL(ec);`
`920`	`920`	`auto order = BignumPointer::New();`
	`921`	`+CHECK(order);`
`921`	`922`	`CHECK(EC_GROUP_get_order(ECKeyPointer::GetGroup(ec), order.get(), nullptr));`
`922`	`923`	`return order.byteLength();`
`923`	`924`	`}`