fixup! code review

Author: benjamingr

lib/internal/streams/from.js

@@ -54,13 +54,13 @@ function from(Readable, iterable, opts) {
     PromisePrototypeThen(
       close(error),
       () => process.nextTick(cb, error), // nextTick is here in case cb throws
-      (e) => process.nextTick(cb, error || e),
+      (e) => process.nextTick(cb, e || error),
     );
   };
 
   async function close(error) {
-    const hadError = typeof error !== 'undefined';
-    const hasThrow = typeof iterator.return === 'function';
+    const hadError = (error !== undefined) && (error !== null);
+    const hasThrow = typeof iterator.throw === 'function';
     if (hadError && hasThrow) {
       const { value, done } = await iterator.throw(error);
       await value;