Bug 1754310 - Do not use clearPending() before it is declared. r=darktrojan

Differential Revision: https://phabricator.services.mozilla.com/D138216

--HG--
extra : amend_source : a803e9978ea4036999ee98a589ffa20adbaf6b4e

calendar/base/src/calCachedCalendar.js

@@ -281,15 +281,15 @@ calCachedCalendar.prototype = {
     return this.mPendingSync;
   },
   async _doSynchronize() {
+    let clearPending = () => {
+      this.mPendingSync = null;
+    };
+
     if (this.getProperty("disabled")) {
       clearPending();
       return;
     }
 
-    let clearPending = () => {
-      this.mPendingSync = null;
-    };
-
     if (this.offline) {
       clearPending();
       return;