xcb: Don't crash on missing mouse pointer

The draganddrop examples all crashed here because they were using a
default-constructed QImage() (i.e. one without any content).

I guess this happens here because I don't have any mouse theme set.
To test, one could start a second X server, but without any WM or DE.

The "evil" QImage() came from QGuiApplicationPrivate::getPixmapCursor().
This function seems to just always "return QPixmap();".

This fix is correct because the only caller has another fallback if the
createNonStandardCursor()-fallback didn't work. This caller is
QXcbCursor::createFontCursor().

Change-Id: I7ec7fbcfdf0203e983149b5e73016cc7e85ecf40
Signed-off-by: Uli Schlachter <psychon@znc.in>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

0 files changed, 0 insertions, 0 deletions