switch missing default case

[Hal Murray]

> I'm unaware of any we can't fix, except the bison one.

There are several others.

>From old CentOS:
> ntp_parser.tab.c:389:6: warning: "YYENABLE_NLS" is not defined
> ntp_parser.tab.c:1323:6: warning: "YYLTYPE_IS_TRIVIAL" is not defined 

>From NetBSD on a Raspbery Pi:
> /usr/pkg/lib/libpython2.7.so: warning: warning: tmpnam()
> possibly used unsafely, use mkstemp() or mkdtemp()
> /usr/pkg/lib/libpython2.7.so: warning: warning: tempnam()
> possibly used unsafely, use mkstemp() or mkdtemp() 

>From old (but still supported) NetBSD:
> ../../ntpd/ntp_control.c:1305:17: warning: array subscript
> has type 'char' [-Wchar-subscripts]





-- 
These are my opinions.  I hate spam.