igt_dummyload: clear signal handler on the desructor as well

Fixes an issue when calling igt_spin_batch_set_timeout and then
tearing down the spinner right away before it has the chance
to timeout, causes the associated signal handler to linger. Make
sure to remove the handler on the destructor.

Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
1 file changed