chatview: fix undefined timestamp warning

Change-Id: If3ee1fd3f074e8807fedc66fc02758df62789b39

src/app/commoncomponents/TimestampInfo.qml

@@ -37,8 +37,8 @@ ColumnLayout {
 
     Connections {
         target: MessagesAdapter.messageListModel
-        function onTimestampUpdate() {
-            if (showTime || showDay) {
+        function onTimestampUpdated() {
+            if ((showTime || showDay) && Timestamp !== undefined) {
                 formattedTime = MessagesAdapter.getFormattedTime(Timestamp)
             }
         }

src/libclient/messagelistmodel.cpp

@@ -39,7 +39,7 @@ MessageListModel::MessageListModel(QObject* parent)
     : QAbstractListModel(parent)
     , timestampTimer_(new QTimer(this))
 {
-    connect(timestampTimer_, &QTimer::timeout, this, &MessageListModel::timestampUpdate);
+    connect(timestampTimer_, &QTimer::timeout, this, &MessageListModel::timestampUpdated);
     timestampTimer_->start(1000);
 }
 

src/libclient/messagelistmodel.h

@@ -134,7 +134,7 @@ public:
     void emitDataChanged(const QString& msgId, VectorInt roles = {});
     bool isOnlyEmoji(const QString& text) const;
 
-    Q_SIGNAL void timestampUpdate();
+    Q_SIGNAL void timestampUpdated();
 
     void addEdition(const QString& msgId, const interaction::Info& info, bool end);
     void addReaction(const QString& messageId, const QString& reactionId);