Handle case of custom-field-only update

lib/custom_wizard/action.rb

@@ -97,9 +97,9 @@ class CustomWizard::Action
   end
 
   def update_profile
-    return unless (profile_updates = action['profile_updates']).length
     params = {}
     
+    if (profile_updates = action['profile_updates'])
       profile_updates.first[:pairs].each do |pair|
         if allowed_profile_field?(pair['key'])
           key = cast_profile_key(pair['key'])
@@ -113,6 +113,7 @@ class CustomWizard::Action
           end
         end
       end
+    end
     
     params = add_custom_fields(params)