Fix segfault in getaddrinfo

[Jarred-Sumner]

The following snippet segfaults on Linux when host points to a domain that can't be resolved:

test "segfault" {
    const std = @import("std");
    var host = "hellooooooooooooooo.1.2.3.4.5.6.67.com";
    var addrinfo: *std.c.addrinfo = undefined;
    _ = std.c.getaddrinfo(
        host,
        null,
        null,
        &addrinfo,
    );
    defer std.c.freeaddrinfo(addrinfo);
}

Stop reason: signal SIGSEGV: invalid address (fault address: 0x0)

[Vexu]

remote: Permission to oven-sh/zig.git denied to Vexu.
fatal: unable to access 'https://github.com/oven-sh/zig/': The requested URL returned error: 403

#14377