KMix crashes when I try to use the sliders "Internal Mic" or "Dock Mic",

Reproducible: Always

Steps to Reproduce:
1. Open KMix
2. Try to adjust volume for Mic
3. Crash
Actual Results:  
Application: KMix (kmix), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4446b92780 (LWP 10986))]

Thread 2 (Thread 0x7f442a8bd700 (LWP 10987)):
#0  0x00007f44464713ed in poll () from /lib64/libc.so.6
#1  0x00007f443c9159d6 in g_main_context_iterate.isra.23 () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f443c915b04 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f444383dcd6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f444380d952 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#5  0x00007f444380dba7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007f444370b0d7 in QThread::exec() () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f44437ed42f in QInotifyFileSystemWatcherEngine::run() () from /usr/lib64/qt4/libQtCore.so.4
#8  0x00007f444370e13c in QThreadPrivate::start(void*) () from /usr/lib64/qt4/libQtCore.so.4
#9  0x00007f4443477ea7 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f444647a0ad in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f4446b92780 (LWP 10986)):
[KCrash Handler]
#6  0x00007f444485d750 in QAbstractSlider::value() const () from /usr/lib64/qt4/libQtGui.so.4
#7  0x00007f444678e376 in MDWSlider::volumeChange(int) () from /usr/lib64/libkdeinit4_kmix.so
#8  0x00007f4446791823 in MDWSlider::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib64/libkdeinit4_kmix.so
#9  0x00007f4443822bc1 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#10 0x00007f4444b1a41e in QAbstractSlider::valueChanged(int) () from /usr/lib64/qt4/libQtGui.so.4
#11 0x00007f44448f01fa in QSlider::mouseMoveEvent(QMouseEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#12 0x00007f44445012e8 in QWidget::event(QEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#13 0x00007f44444b0be4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#14 0x00007f44444b6283 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#15 0x00007f4445c57646 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#16 0x00007f444380ee1c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/qt4/libQtCore.so.4
#17 0x00007f44444b1bb2 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib64/qt4/libQtGui.so.4
#18 0x00007f444452d558 in QETWidget::translateMouseEvent(_XEvent const*) () from /usr/lib64/qt4/libQtGui.so.4
#19 0x00007f444452c34a in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#20 0x00007f4444553c42 in x11EventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib64/qt4/libQtGui.so.4
#21 0x00007f443c9156f3 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#22 0x00007f443c915a40 in g_main_context_iterate.isra.23 () from /usr/lib64/libglib-2.0.so.0
#23 0x00007f443c915b04 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#24 0x00007f444383dc6f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#25 0x00007f44445538de in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtGui.so.4
#26 0x00007f444380d952 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#27 0x00007f444380dba7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#28 0x00007f44438129c5 in QCoreApplication::exec() () from /usr/lib64/qt4/libQtCore.so.4
#29 0x00007f44467728b2 in kdemain () from /usr/lib64/libkdeinit4_kmix.so
#30 0x00007f44463b391d in __libc_start_main () from /lib64/libc.so.6
#31 0x00000000004007c1 in _start ()



KMix Version: Master