Add missing sc_unlock and fix typo in comment in card-piv.c

 On branch piv-aid-discovery
 Changes to be committed:
	modified:   card-piv.c

src/libopensc/card-piv.c

@@ -3036,7 +3036,7 @@ static int piv_match_card(sc_card_t *card)
  if (card->type == -1)
  card->type = type;
 
- card->drv_data = priv; /* will frre if no match, or pass on to piv_init */
+ card->drv_data = priv; /* will free if no match, or pass on to piv_init */
  priv->aid_file = sc_file_new();
  priv->selected_obj = -1;
  priv->pin_preference = 0x80; /* 800-73-3 part 1, table 3 */
@@ -3394,6 +3394,7 @@ piv_pin_cmd(sc_card_t *card, struct sc_pin_cmd_data *data, int *tries_left)
  if (data->cmd == SC_PIN_CMD_VERIFY && r < 0 && priv->context_specific) {
  sc_log(card->ctx,"Clearing CONTEXT_SPECIFIC");
  priv->context_specific = 0;
+ sc_unlock(card);
  }
 
  /* if access to applet is know to be reset by other driver we select_aid and try again */