Update comments

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

spec/browserify/sync-browserify.spec.js

@@ -99,5 +99,5 @@ describe("Browserify Test", function() {
                 client.once("sync.unexpectedError", reject);
             }),
         ]);
-    }, 20000);
+    }, 20000); // additional timeout as this test can take quite a while
 });

src/models/room.js

@@ -374,7 +374,7 @@ Room.prototype.hasPendingEvent = function(eventId) {
 };
 
 /**
- * Get a specific event from the pending event list, if configured, undefined otherwise.
+ * Get a specific event from the pending event list, if configured, null otherwise.
  *
  * @param {string} eventId The event ID to check for.
  * @return {MatrixEvent}