lib: af/hw: localize init functions

These are only used internally to initialize themselves, so mark them
static.

lib/af.c

@@ -156,7 +156,7 @@ struct aftype *aftypes[] =
     NULL
 };
 
-void afinit()
+static void afinit(void)
 {
     unspec_aftype.title = _("UNSPEC");
 #if HAVE_AFUNIX

lib/hw.c

@@ -160,7 +160,7 @@ static struct hwtype *hwtypes[] =
 
 static short sVhwinit = 0;
 
-void hwinit()
+static void hwinit(void)
 {
     loop_hwtype.title = _("Local Loopback");
     unspec_hwtype.title = _("UNSPEC");