HID: pidff: effect can't be NULL
HID: pidff: effect can't be NULL

Force-beedback core guarantees that the 'effect' pointer that's being passed
to ->upload() callback is non-NULL.

Reported-by: Dan Carpenter <ff341aa343d564f9e53e9dcb6996be8c04859a66@oracle.com>
Signed-off-by: Jiri Kosina <ed58f755cc8caaf10c3e8c731a8b86fb8f13d6cb@suse.cz>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs