Adding the "if d is None" to the event handling code meant some of
these tests stopped working. The reason is that len(d) was zero but
not equal to None.
Passing the data object to the register() function in the test
correctly registers the event handler and avoids the problem, it
just happened to work previously, incorrectly.
(Bitbake rev: 426eb83c6668d82a2ebaca6c672db131e37c11da)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
cca5433baf