Crashes with segfault if hostname is invalid

[nroach44]

If you run ps2client with a PS2HOSTNAME that looks like an IP address, but actually has a letter in it, ps2client will segfault.

Nov 18 13:20:57 x13al kernel: ps2client[256502]: segfault at 18 ip 000055abcf5a1857 sp 00007ffc0acaaaf0 error 4 in ps2client[55abcf5a1000+3000] likely on CPU 4 (core 2, socket 0)
Nov 18 13:20:57 x13al kernel: Code: 00 00 00 53 66 c1 c6 08 b8 02 00 00 00 89 d3 48 83 ec 10 66 89 74 24 02 66 89 04 24 e8 42 f9 ff ff 31 d2 89 de bf 02 00 00 00 <48> 8b 40 18 48 8b 00 8b 00 89 44 24 04 e8 17 fa ff ff 85 c0 78 23

Compiling with DEBUG=1 gets:

(gdb) run
Starting program: /home/nroach44/media/code/psx/ps2client/bin/ps2client execee host:bin/PS2LINK.ELF
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff7dba6c0 (LWP 257251)]

Thread 1 "ps2client" received signal SIGSEGV, Segmentation fault.
network_connect (hostname=0x55555555c180 <hostname> "1.1.l.1", port=18193, type=1) at src/network.c:35
35	  sockaddr.sin_addr = *(struct in_addr *)gethostbyname(hostname)->h_addr;

It is not apparent to the user why ps2client crashes, as it just dies.