Print control characters, even though they are normally not visible.

With cons25, there are printable characters below 0x1B. This is not the
case with ASCII, UTF-8, etc. but in this case we just have to.

Also don't set LC_CTYPE to UTF-8 when libteken is compiled without UTF-8
in the demo-application.

sys/dev/syscons/teken/teken.c

@@ -53,10 +53,14 @@ static FILE *df;
 #include "teken_wcwidth.h"
 #else /* !TEKEN_UTF8 */
 static inline int
-teken_wcwidth(teken_char_t c)
+teken_wcwidth(teken_char_t c __unused)
 {
 
+#ifdef TEKEN_CONS25
+	return (1);
+#else /* !TEKEN_CONS25 */
 	return (c <= 0x1B) ? -1 : 1;
+#endif /* TEKEN_CONS25 */
 }
 #endif /* TEKEN_UTF8 */
 

sys/dev/syscons/teken/teken_demo.c

@@ -280,7 +280,9 @@ main(int argc __unused, char *argv[] __unused)
 		exit(1);
 	case 0:
 		setenv("TERM", "cons25", 1);
+#ifdef TEKEN_UTF8
 		setenv("LC_CTYPE", "UTF-8", 0);
+#endif /* TEKEN_UTF8 */
 		execlp("zsh", "-zsh", NULL);
 		execlp("bash", "-bash", NULL);
 		execlp("sh", "-sh", NULL);