Silence a few -Wextra warnings

Silence a few -Wextra warnings by #include-ing a missing header file,

and by properly terminating an array of structs.

--- cstream-2.7.6/cstream.c	2008-12-19 22:38:37.000000000 +0100

+++ cstream-2.7.6-Wextra/cstream.c	2008-12-20 11:21:12.000000000 +0100

@@ -97,6 +97,7 @@

 #else

 #ifdef HAVE_SYS_SOUNDCARD_H

 #include <sys/soundcard.h>

+#include <sys/ioctl.h>

 #define WANT_SOUND 1

 #else

 #ifdef HAVE_LINUX_SOUNDCARD_H

@@ -525,7 +529,7 @@

     } *it, funcs[3] = {

       {getsockname, "getsockname", "Local binding"},

       {getpeername, "getpeername", "Remote binding"},

-      {NULL}

+      {NULL, NULL, NULL}

     };

     union {

       struct sockaddr sa;