Do not replace redirection location if nil

app/middleware/no_cms/microsites/micrositer.rb

@@ -97,7 +97,7 @@ def replace_host_for response, request, microsite, headers, status
     # If we are redirecting, we need to remove root path from redirection url too
     if status == 302
       new_location = headers["Location"].gsub!("#{request.host}#{microsite.root_path}", "#{request.host}/")
-      headers["Location"] = new_location
+      headers["Location"] = new_location unless new_location.blank?
     end
     if response.respond_to? :header
       response.header["Content-Length"] = length.to_s