fix electron too

src/vector/platform/ElectronPlatform.js

@@ -58,6 +58,7 @@ function platformFriendlyName() {
 
 export default class ElectronPlatform extends VectorBasePlatform {
     setNotificationCount(count: number) {
+        if (this.notificationCount === number) return;
         super.setNotificationCount(count);
         // this sometimes throws because electron is made of fail:
         // https://github.com/electron/electron/issues/7351