Fix uninitialized variables

src/widgets/busyindicator.cpp

@@ -33,13 +33,21 @@ class QHideEvent;
 class QShowEvent;
 
 BusyIndicator::BusyIndicator(const QString &text, QWidget *parent)
-  : QWidget(parent) {
+  : QWidget(parent),
+    movie_(nullptr),
+    label_(nullptr) {
+
   Init(text);
+
 }
 
 BusyIndicator::BusyIndicator(QWidget *parent)
-  : QWidget(parent) {
+  : QWidget(parent),
+    movie_(nullptr),
+    label_(nullptr) {
+
   Init(QString());
+
 }
 
 void BusyIndicator::Init(const QString &text) {

src/widgets/volumeslider.cpp

@@ -218,6 +218,7 @@ QSize PrettySlider::sizeHint() const {
 
 VolumeSlider::VolumeSlider(QWidget *parent, const uint max)
     : SliderSlider(Qt::Horizontal, parent, max),
+      anim_enter_(false),
       anim_count_(0),
       timer_anim_(new QTimer(this)),
       pixmap_inset_(QPixmap(drawVolumePixmap())) {