All error handling paths of this function call 'apr_brigade_destroy()' , except this one.
So add it here too.

Probably spotted with the help of the Coccinelle software (Thx Julia for the patch and for Coccinelle)

See PR 53016

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1832351 13f79535-47bb-0310-9956-ffa450edef68
