Fixes valgrind warning
==21054== Conditional jump or move depends on uninitialised value(s)
==21054==    at 0x5DAE6D4: QQuickListView::viewportMoved(QFlags<Qt::Orientation>) (qquicklistview.cpp:2789)
==21054==    by 0x5D9ED76: QQuickFlickablePrivate::itemGeometryChanged(QQuickItem*, QRectF const&, QRectF const&) (qquickflickable.cpp:296)
==21054==    by 0x5DFC438: QQuickItemViewPrivate::itemGeometryChanged(QQuickItem*, QRectF const&, QRectF const&) (qquickitemview.cpp:1158)
==21054==    by 0x5DAC6A2: QQuickListViewPrivate::itemGeometryChanged(QQuickItem*, QRectF const&, QRectF const&) (qquicklistview.cpp:1369)
==21054==    by 0x5D0D5F2: QQuickItem::geometryChanged(QRectF const&, QRectF const&) (qquickitem.cpp:3365)
==21054==    by 0x5D11822: QQuickItem::setY(double) (qquickitem.cpp:5858)
==21054==    by 0x5C84FED: QQuickTimeLinePrivate::advance(int) (qquicktimeline.cpp:826)
==21054==    by 0x5C85155: QQuickTimeLine::updateCurrentTime(int) (qquicktimeline.cpp:702)
==21054==    by 0x58576FA: QAbstractAnimationJob::setCurrentTime(int) (qabstractanimationjob.cpp:497)
==21054==    by 0x5857BDD: QQmlAnimationTimer::updateAnimationsTime(long long) (qabstractanimationjob.cpp:119)
==21054==    by 0x640C7EC: QUnifiedTimer::updateAnimationTimers(long long) (in /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.3.0)
==21054==    by 0x58570C8: QQmlAnimationTimer::startAnimations() (qabstractanimationjob.cpp:152)
==21054==    by 0x66895B5: QObject::event(QEvent*) (in /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.3.0)
==21054==    by 0x6659CDC: QCoreApplication::notify(QObject*, QEvent*) (in /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.3.0)
==21054==    by 0x66599D4: QCoreApplication::notifyInternal(QObject*, QEvent*) (in /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.3.0)
==21054==    by 0x665B826: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (in /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.3.0)
==21054==    by 0x66B1242: ??? (in /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.3.0)
==21054==    by 0x8EE2E43: g_main_context_dispatch (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4100.0)
==21054==    by 0x8EE3087: g_main_context_iterate.isra.24 (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4100.0)
==21054==    by 0x8EE312B: g_main_context_iteration (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4100.0)
==21054==    by 0x66B06BB: QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (in /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.3.0)
==21054==    by 0x66578EA: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (in /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.3.0)
==21054==    by 0x665EF45: QCoreApplication::exec() (in /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.3.0)

Change-Id: I72e101140b8bee0b6867cf92902e70660c8d21ab
Reviewed-by: Martin Jones <martin.jones@jollamobile.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>