prevent memory leak in init of jwks_provider->jwks_uri->endpoint->url

Signed-off-by: Hans Zandbelt <hans.zandbelt@openidc.com>

Author: zandbelt

src/jose.c

@@ -1882,6 +1882,13 @@ _OAUTH_CFG_CTX_CALLBACK(oauth2_jose_verify_options_jwk_set_aws_alb)
 		goto end;
 
 	oauth2_jose_jwt_verify_ctx_t *ptr = verify->ctx->ptr;
+
+	// this is going to be set dynamically
+	if (ptr->jwks_provider->jwks_uri->endpoint->url) {
+		oauth2_mem_free(ptr->jwks_provider->jwks_uri->endpoint->url);
+		ptr->jwks_provider->jwks_uri->endpoint->url = NULL;
+	}
+
 	ptr->jwks_provider->alb_arn = oauth2_strdup(value);
 
 	alb_base_url = oauth2_nv_list_get(log, params, "alb_base_url");