css: Plug a memory leak
When a rule has no styles, we don't add it to our ruleset. Since we are not adopting the selectors in this case, we must free them.
Fixes: #2921 (closed)
When a rule has no styles, we don't add it to our ruleset. Since we are not adopting the selectors in this case, we must free them.
Fixes: #2921 (closed)