Fix unterminated comment

Fixes a cppcheck error: rigs/mds/serialnum.c:106:1: error: Unmatched '}'. Configuration: ''. [syntaxError]
2023-03-04 23:11:57 +01:00 · 2023-03-04 23:11:57 +01:00 · 9ad9f23fe1
commit 9ad9f23fe1
--- a/rigs/mds/serialnum.c
+++ b/rigs/mds/serialnum.c
@ -16,7 +16,7 @@
    12 - Radio Inhibit (Sleep).
    13 - Reserved
    14 - PTT +5V
-
+*/
 void serial_num(char *s)
 {