Fix some pedantic warnings.

Introduced by #3862

Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3944)
diff --git a/apps/passwd.c b/apps/passwd.c
index eb5a622..ea27c18 100644
--- a/apps/passwd.c
+++ b/apps/passwd.c
@@ -66,7 +66,7 @@
     OPT_IN,
     OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1,
     OPT_1, OPT_5, OPT_6, OPT_CRYPT, OPT_AIXMD5, OPT_SALT, OPT_STDIN,
-    OPT_R_ENUM,
+    OPT_R_ENUM
 } OPTION_CHOICE;
 
 const OPTIONS passwd_options[] = {