scd: Detect missing card in "getinfo all_active_apps".

* scd/app.c (send_card_and_app_list): Detect no app case.
--

This is a minor nug fix to return a better error message.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/scd/app.c b/scd/app.c
index 0843ed445..761ed984c 100644
--- a/scd/app.c
+++ b/scd/app.c
@@ -2142,6 +2142,11 @@ send_card_and_app_list (ctrl_t ctrl, card_t wantcard, int with_apps)
   npth_mutex_lock (&card_list_lock);
   for (n=0, c = card_top; c; c = c->next)
     n++;
+  if (!n)
+    {
+      err = gpg_error (GPG_ERR_CARD_NOT_PRESENT);
+      goto leave;
+    }
   cardlist = xtrycalloc (n, sizeof *cardlist);
   if (!cardlist)
     {