call JS_free on signature if EVP_PKEY_sign failed

Author: Jake Champion

c-dependencies/js-compute-runtime/builtins/crypto-algorithm.cpp

@@ -639,6 +639,7 @@ JSObject *CryptoAlgorithmRSASSA_PKCS1_v1_5_Sign_Verify::sign(JSContext *cx, JS::
   if (EVP_PKEY_sign(ctx, signature, &signature_length, digest.data(), digest.size()) <= 0) {
     // TODO Rename error to OperationError
     JS_ReportErrorLatin1(cx, "OperationError");
+    JS_free(cx, signature);
     return nullptr;
   }