use nesting instead of short-circuited && operator

src/matrix-to.js

@@ -146,7 +146,8 @@ export class RoomPermalinkCreator {
 
     _updateHighestPlUser() {
         const plEvent = this._room.currentState.getStateEvents("m.room.power_levels", "");
-        const content = plEvent && plEvent.getContent();
+        if (plEvent) {
+            const content = plEvent.getContent();
             if (content) {
                 const users = content.users;
                 if (users) {
@@ -172,6 +173,7 @@ export class RoomPermalinkCreator {
                     }
                 }
             }
+        }
         this._highestPlUserId = null;
     }