Respond to CR.

// FREEBIE

src/Messages/TSMessagesManager.m

@@ -635,12 +635,11 @@ NS_ASSUME_NONNULL_BEGIN
 
           // Any messages sent from the current user - from this device or another - should be
           // automatically marked as read.
-          if ([TSAccountManager isRegistered]) {
+          OWSAssert([TSAccountManager isRegistered]);
           BOOL shouldMarkMessageAsRead = [envelope.source isEqualToString:[TSAccountManager localNumber]];
           if (shouldMarkMessageAsRead) {
               [incomingMessage markAsReadLocallyWithTransaction:transaction];
           }
-          }
 
           // Android allows attachments to be sent with body.
           if ([attachmentIds count] > 0 && body != nil && ![body isEqualToString:@""]) {