Fix self-assignment of callback.

CHANGES.md

@@ -22,7 +22,8 @@ Build 🧱:
  - SDK is now API level 21 minimum, and so RiotX (#405)
 
 Other changes:
- -
+ - Fix self-assignment of callback in `DefaultRoomPushRuleService#setRoomNotificationState` (#1520)
+ - Random housekeeping clean-ups indicated by Lint (#1520)
 
 Changes in RiotX 0.22.0 (2020-06-15)
 ===================================================

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/notification/DefaultRoomPushRuleService.kt

@@ -51,7 +51,7 @@ internal class DefaultRoomPushRuleService @AssistedInject constructor(@Assisted
     override fun setRoomNotificationState(roomNotificationState: RoomNotificationState, matrixCallback: MatrixCallback<Unit>): Cancelable {
         return setRoomNotificationStateTask
                 .configureWith(SetRoomNotificationStateTask.Params(roomId, roomNotificationState)) {
-                    this.callback = callback
+                    this.callback = matrixCallback
                 }
                 .executeBy(taskExecutor)
     }