Fix undefined method error in sidekiq (#9807)

* Fix undefined method error in sidekiq

Body can be not nil but still be empty, which causes a
`NoMethodError: undefined method `[]' for nil:NilClass` further in the
code. This checks for an empty body to avoid the issue.

* Fix codeclimate issue

1 files changed, 1 insertions, 1 deletions

diff --git a/app/services/fetch_oembed_service.rb b/app/services/fetch_oembed_service.rb
index 9ddf9b13b..10176cfb9 100644
--- a/app/services/fetch_oembed_service.rb
+++ b/app/services/fetch_oembed_service.rb
@@ -43,7 +43,7 @@ class FetchOEmbedService
       res.code != 200 ? nil : res.body_with_limit
     end
 
-    validate(parse_for_format(body)) unless body.nil?
+    validate(parse_for_format(body)) if body.present?
   rescue Oj::ParseError, Ox::ParseError
     nil
   end