Comment 10 for bug 901838

Looks like this is the Xcursor code:
http://cgit.freedesktop.org/xorg/lib/libXcursor/tree/src/xlib.c?id=e086eb1bf49f2a8c270eaebd5beb595c1dc2973e#n415

gdk_cursor_new_from_name() also uses XcursorLibraryLoadCursor(), so it should be possible to get the same behavior.

If the cursor can also be found under the "left_ptr_watch" name then that would be preferable for the lookup. As a last resort, the name from the hash can be used.