Fix recently merged test

Author: Steven Orvell

src/lib/updating-element.ts

@@ -502,9 +502,8 @@ export abstract class UpdatingElement extends HTMLElement {
     if (this.shouldUpdate(this._changedProperties)) {
       const changedProperties = this._changedProperties;
       this.update(changedProperties);
-      const needsFirstUpdate = !(this._updateState & STATE_HAS_UPDATED);
       this._markUpdated();
-      if (needsFirstUpdate) {
+      if (!(this._updateState & STATE_HAS_UPDATED)) {
         this._updateState = this._updateState | STATE_HAS_UPDATED;
         this.firstUpdated(changedProperties);
       }

src/test/lit-element_test.ts

@@ -1097,12 +1097,11 @@ suite('LitElement', () => {
         const el = new E();
         container.appendChild(el);
         await el.updateComplete;
-        const testMap = new Map();
-        testMap.set('foo', undefined);
         assert.equal(el.triedToUpdatedCount, 1);
         assert.equal(el.wasUpdatedCount, 0);
         assert.equal(el.wasFirstUpdated, 0);
         await el.requestUpdate();
+        const testMap = new Map();
         assert.deepEqual(el.changedProperties, testMap);
         assert.equal(el.triedToUpdatedCount, 2);
         assert.equal(el.wasUpdatedCount, 1);