benchmark: fix error on server close in AsyncLocalStorage benchmark

PR-URL: #32503
Reviewed-By: Vladimir de Turckheim <vlad2t@hotmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

benchmark/async_hooks/async-resource-vs-destroy.js

@@ -37,17 +37,14 @@ function buildCurrentResource(getServe) {
 
   function getCLS() {
     const resource = executionAsyncResource();
-    if (resource === null || !resource[cls]) {
+    if (!resource[cls]) {
       return null;
     }
     return resource[cls].state;
   }
 
   function setCLS(state) {
     const resource = executionAsyncResource();
-    if (resource === null) {
-      return;
-    }
     if (!resource[cls]) {
       resource[cls] = { state };
     } else {
@@ -118,11 +115,17 @@ function buildAsyncLocalStorage(getServe) {
 
   function getCLS() {
     const store = asyncLocalStorage.getStore();
+    if (store === undefined) {
+      return null;
+    }
     return store.state;
   }
 
   function setCLS(state) {
     const store = asyncLocalStorage.getStore();
+    if (store === undefined) {
+      return;
+    }
     store.state = state;
   }