Send mouse release generated from TouchCancel to the proper window

Change-Id: I3d0ab79eb261de4d22c6aadf0672f5c84ff3533e
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/plugins/platforms/wayland/qwaylandtouch.cpp

@@ -198,7 +198,7 @@ void QWaylandTouchExtension::touchCanceled()
     mTouchPoints.clear();
     mPrevTouchPoints.clear();
     if (mMouseSourceId != -1)
-        QWindowSystemInterface::handleMouseEvent(0, mTimestamp, mLastMouseLocal, mLastMouseGlobal, Qt::NoButton);
+        QWindowSystemInterface::handleMouseEvent(mTargetWindow, mTimestamp, mLastMouseLocal, mLastMouseGlobal, Qt::NoButton);
 }
 
 void QWaylandTouchExtension::handle_configure(void *data, wl_touch_extension *ext, uint32_t flags)