Declare read-only data const

libmisc/pam_pass_non_interactive.c

@@ -22,7 +22,7 @@ static int ni_conv (int num_msg,
                     const struct pam_message **msg,
                     struct pam_response **resp,
                     unused void *appdata_ptr);
-static struct pam_conv non_interactive_pam_conv = {
+static const struct pam_conv non_interactive_pam_conv = {
 	ni_conv,
 	NULL
 };