MESSENGER-3539 prevent logout and error popup when logging out

Riot/Modules/Settings/SettingsViewController.h

@@ -16,6 +16,14 @@
 
 #import "MatrixKit.h"
 
+FOUNDATION_EXPORT NSString *const BWISettingsErrorDomain;
+
+typedef enum : NSUInteger
+{
+    BWISettingsOfflineLogoutErrorCode
+}
+BWISettingsErrorCode;
+
 @interface SettingsViewController : MXKTableViewController
 
 + (instancetype)instantiate;