This fixes a wineboot crash on FreeBSD, where getaddrinfo() returns a NULL
ai_canonname, causing wineboot to pass NULL to strchr().

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50408Signed-off-by: Damjan Jovanovic <damjan.jov@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>