Comment 11 for bug 901838

Looks like a left_ptr_watch lookup should be the same as a 08e8e1c95fe2fc01f976f1e063a24ccd.

http://cgit.freedesktop.org/xorg/data/cursors/tree/handhelds/Makefile.cfg

I guess we can't be certain the lookup will succeed, so we'd still have to fallback to the pixbuf.