[Freeciv-Dev] (PR#13307) server crash with closed stdin

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=13307 >

If you compile freeciv without readline (undefine the *READLINE* entries
in config.h) and then run it with closed stdin (*not* the same as
running `civserver </dev/null`) then the server will die.

#0  0x40085921 in kill () from /lib/libc.so.6
#1  0x401a707b in pthread_kill () from /lib/libpthread.so.0
#2  0x401a7420 in raise () from /lib/libpthread.so.0
#3  0x400855d3 in raise () from /lib/libc.so.6
#4  0x40086988 in abort () from /lib/libc.so.6
#5  0x4007ecf0 in __assert_fail () from /lib/libc.so.6
#6  0x0804bee4 in real_die (file=0x810f051 "sernet.c", line=604,
format=0x810f175 "read from stdin failed") at shared.c:675
#7  0x08050860 in sniff_packets () at sernet.c:604
#8  0x08052928 in srv_main () at srv_main.c:1694
#9  0x0804a222 in main (argc=5, argv=0xbffff7d4) at civserver.c:210

-jason