* ext/socket/raddrinfo.c (numeric_getaddrinfo): Use xcalloc.
  Suggested by Eric Wong.
  https://bugs.ruby-lang.org/issues/9525#note-14



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45063 b2dd03c8-39d4-4d8f-98ff-823fe69b080e