[gnome-settings-daemon/gnome-3-34] smartcard: Initialize a pointer before use

[Benjamin Berg <bberg src gnome org>]

commit d477ba5357c1223bda2d844990b3221aecb878bb
Author: Marek Kasik <mkasik redhat com>
Date:   Mon Nov 4 18:52:18 2019 +0100

    smartcard: Initialize a pointer before use
    
    Pointer to PK11SlotInfo in watch_one_event_from_driver()
    could be used uninitialized after one of my commits.
    This commit fixes it.

 plugins/smartcard/gsd-smartcard-manager.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plugins/smartcard/gsd-smartcard-manager.c b/plugins/smartcard/gsd-smartcard-manager.c
index d43d5c79..fc6ae0b0 100644
--- a/plugins/smartcard/gsd-smartcard-manager.c
+++ b/plugins/smartcard/gsd-smartcard-manager.c
@@ -180,7 +180,7 @@ watch_one_event_from_driver (GsdSmartcardManager       *self,
                              GCancellable              *cancellable,
                              GError                   **error)
 {
-        PK11SlotInfo *card, *old_card;
+        PK11SlotInfo *card = NULL, *old_card;
         CK_SLOT_ID slot_id;
         gulong handler_id;
         int old_slot_series = -1, slot_series;