jamiaccount: fail call if not loaded

Change-Id: I9c5d211598890f443761c4902c1290d8ace5a55a

src/jamidht/account_manager.cpp

@@ -505,6 +505,12 @@ AccountManager::forEachDevice(const dht::InfoHash& to,
                            std::function<void(const dht::InfoHash&)>&& op,
                            std::function<void(bool)>&& end)
 {
+    if (not dht_) {
+        JAMI_ERR("forEachDevice: no dht");
+        if (end)
+            end(false);
+        return;
+    }
     auto treatedDevices = std::make_shared<std::set<dht::InfoHash>>();
     dht_->get<dht::crypto::RevocationList>(to, [to](dht::crypto::RevocationList&& crl){
         tls::CertificateStore::instance().pinRevocationList(to.toString(), std::move(crl));

src/jamidht/jamiaccount.cpp

@@ -464,7 +464,7 @@ initICE(const std::vector<uint8_t> &msg, const std::shared_ptr<IceTransport> &ic
 void
 JamiAccount::startOutgoingCall(const std::shared_ptr<SIPCall>& call, const std::string& toUri)
 {
-    if (not accountManager_) {
+    if (not accountManager_ or not dht_) {
         call->onFailure(ENETDOWN);
         return;
     }