Fix typo.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1611596 13f79535-47bb-0310-9956-ffa450edef68
Update porposal -- Ruediger spotted the hand-merge error:

+                    if (!apr_is_empty_table(rp->trailers_in)) {
+                        apr_table_do(add_trailers, rp->trailers_out,
                                                    ^
+                                rp->trailers_in, NULL);
+                        apr_table_clear(rp->trailers_in);
+                    }



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1611597 13f79535-47bb-0310-9956-ffa450edef68