handle the case when no cards are collected

Signed-off-by: Olivier Gayot <duskcoder@gmail.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/server.py b/server.py
index 5d117e9..162cd5d 100755
--- a/server.py
+++ b/server.py
@@ -39,11 +39,12 @@ def message_received_handler(client, server, message):
         elif op == 'pick_black_card':
             res = client['cao_client'].pick_black_card()
         elif op == 'designate_card':
+            card_id = None
             try:
                 card_id = int(json_msg['card_id'])
-            except KeyError:
-                res = cao_error('field `card_id\' is required')
-            else:
+            except (KeyError, TypeError):
+                pass
+            finally:
                 res = client['cao_client'].designate_card(card_id)
         elif op == 'play_white_card':
             try: