check json_pack return value, just to be nice

src/exchange-lib/exchange_api_admin.c

@@ -187,6 +187,11 @@ TALER_EXCHANGE_admin_add_incoming (struct TALER_EXCHANGE_Handle *exchange,
                          "execution_date", GNUNET_JSON_from_time_abs (execution_date),
                          "sender_account_details", sender_account_details,
                          "transfer_details", transfer_details);
+  if (NULL == admin_obj)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
   aai = GNUNET_new (struct TALER_EXCHANGE_AdminAddIncomingHandle);
   aai->exchange = exchange;
   aai->cb = res_cb;

src/exchange-lib/exchange_api_deposit.c

@@ -463,6 +463,11 @@ TALER_EXCHANGE_deposit (struct TALER_EXCHANGE_Handle *exchange,
                            "wire_transfer_deadline", GNUNET_JSON_from_time_abs (wire_deadline),
                            "coin_sig", GNUNET_JSON_from_data_auto (coin_sig)
                            );
+  if (NULL == deposit_obj)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
 
   dh = GNUNET_new (struct TALER_EXCHANGE_DepositHandle);
   dh->exchange = exchange;

src/exchange-lib/exchange_api_payback.c

@@ -306,7 +306,11 @@ TALER_EXCHANGE_payback (struct TALER_EXCHANGE_Handle *exchange,
                            "coin_sig", GNUNET_JSON_from_data_auto (&coin_sig),
                            "coin_blind_key_secret", GNUNET_JSON_from_data_auto (blinding_key)
 			  );
-  GNUNET_assert (NULL != payback_obj);
+  if (NULL == payback_obj)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
 
   ph = GNUNET_new (struct TALER_EXCHANGE_PaybackHandle);
   ph->coin_pub = pr.coin_pub;

src/exchange-lib/exchange_api_refresh.c

@@ -1337,6 +1337,11 @@ TALER_EXCHANGE_refresh_melt (struct TALER_EXCHANGE_Handle *exchange,
                         "melt_coin", melt_coin,
                         "coin_evs", coin_evs,
                         "transfer_pubs", transfer_pubs);
+  if (NULL == melt_obj)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
 
   /* and now we can at last begin the actual request handling */
   rmh = GNUNET_new (struct TALER_EXCHANGE_RefreshMeltHandle);
@@ -1723,6 +1728,11 @@ TALER_EXCHANGE_refresh_reveal (struct TALER_EXCHANGE_Handle *exchange,
                           GNUNET_JSON_from_data_auto (&md->melt_session_hash),
                           "transfer_privs",
                           transfer_privs);
+  if (NULL == reveal_obj)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
 
   /* finally, we can actually issue the request */
   rrh = GNUNET_new (struct TALER_EXCHANGE_RefreshRevealHandle);

src/exchange-lib/exchange_api_refund.c

@@ -279,7 +279,11 @@ TALER_EXCHANGE_refund (struct TALER_EXCHANGE_Handle *exchange,
 			  "merchant_pub", GNUNET_JSON_from_data_auto (&rr.merchant),
 			  "merchant_sig", GNUNET_JSON_from_data_auto (&merchant_sig)
 			  );
-  GNUNET_assert (NULL != refund_obj);
+  if (NULL == refund_obj)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
 
   rh = GNUNET_new (struct TALER_EXCHANGE_RefundHandle);
   rh->exchange = exchange;

src/exchange-lib/exchange_api_reserve.c

@@ -1015,6 +1015,12 @@ TALER_EXCHANGE_reserve_withdraw (struct TALER_EXCHANGE_Handle *exchange,
                             "reserve_pub", GNUNET_JSON_from_data_auto (&wsh->reserve_pub),
                             "reserve_sig", GNUNET_JSON_from_data_auto (&reserve_sig));
   GNUNET_free (coin_ev);
+  if (NULL == withdraw_obj)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
+
 
   wsh->blinding_key = *blinding_key;
   wsh->url = MAH_path_to_url (exchange, "/reserve/withdraw");

src/exchange-lib/exchange_api_track_transaction.c

@@ -303,6 +303,11 @@ TALER_EXCHANGE_track_transaction (struct TALER_EXCHANGE_Handle *exchange,
                                 "coin_pub", GNUNET_JSON_from_data_auto (coin_pub),
                                 "merchant_pub", GNUNET_JSON_from_data_auto (&dtp.merchant),
                                 "merchant_sig", GNUNET_JSON_from_data_auto (&merchant_sig));
+  if (NULL == deposit_wtid_obj)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
 
   dwh = GNUNET_new (struct TALER_EXCHANGE_TrackTransactionHandle);
   dwh->exchange = exchange;