Fix crash on windows (camera)

widget/camera.cpp

@@ -10,11 +10,13 @@ Camera::Camera()
     camera->setCaptureMode(QCamera::CaptureVideo);
     camera->setViewfinder(this);
 
+    /* CRASHES ON WINDOWS !
     QMediaService *m = camera->service();
     QVideoEncoderSettingsControl *enc = m->requestControl<QVideoEncoderSettingsControl*>();
     QVideoEncoderSettings sets = enc->videoSettings();
     sets.setResolution(640, 480);
     enc->setVideoSettings(sets);
+    */
 
     connect(camera, SIGNAL(error(QCamera::Error)), this, SLOT(onCameraError(QCamera::Error)));
 

widget/widget.cpp

@@ -44,6 +44,7 @@ Widget::Widget(QWidget *parent) :
     qRegisterMetaType<ToxFile::FileDirection>("ToxFile::FileDirection");
 
     core = new Core(camera);
+    core = new Core(nullptr);
     coreThread = new QThread(this);
     core->moveToThread(coreThread);
     connect(coreThread, &QThread::started, core, &Core::start);