Running qmlscene with linuxfb plugin changes consoleblank

1. Boot kernel with consoleblank=0
2. Login from Linux console (X server not running)
3. cat /sys/module/kernel/parameters/consoleblank
   Observe that it is 0
4. QT_QPA_PLATFORM=linuxfb qmlscene
5. Login to system from remote computer using SSH
6. killall qmlscene
7. cat /sys/module/kernel/parameters/consoleblank
   Observe that it has changed to 900

The issue does not occur if qmlscene is started from an SSH session. It seems to be caused by setTTYCursor in src/platformspport/fbconvenience/qfbvthandler.cpp:

http://code.qt.io/cgit/qt/qtbase.git/tree/src/platformsupport/fbconvenience/qfbvthandler.cpp#n71