Respond to CR.

Signal/src/util/Backup/OWSBackup.m

@@ -138,10 +138,12 @@ NSError *OWSBackupErrorWithDescription(NSString *description)
 
 - (void)setup
 {
-    if (OWSBackup.isFeatureEnabled) {
+    if (!OWSBackup.isFeatureEnabled) {
-        [OWSBackupAPI setup];
+        return;
     }
 
+    [OWSBackupAPI setup];
+
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(applicationDidBecomeActive:)
                                                  name:OWSApplicationDidBecomeActiveNotification