windows: fix callStateChanged handling

Refs #72789

Change-Id: I2d99c0544513a885d05530247681587211059c10

callwidget.cpp

@@ -194,13 +194,15 @@ void
 CallWidget::callStateChanged(Call* call, Call::State previousState)
 {
     Q_UNUSED(previousState)
+    if (call == nullptr)
+        return;
     ui->callList->setCurrentIndex(callModel_->getIndex(actualCall_));
     if (call->state() == Call::State::OVER) {
         actualCall_ = nullptr;
         ui->videoWidget->hide();
     } else if (call->state() == Call::State::HOLD) {
         ui->videoWidget->hide();
-    } else {
+    } else if (call->state() == Call::State::CURRENT){
         ui->videoWidget->show();
         ui->messageOutput->setModel(
                     IMConversationManager::instance()->getModel(actualCall_));

callwidget.ui

@@ -240,6 +240,12 @@
      </item>
      <item alignment="Qt::AlignHCenter">
       <widget class="QLabel" name="callStateLabel">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
        <property name="text">
         <string>Call State :</string>
        </property>