Add permissions for delete polls and delete own polls

I see this really makes sense and looks fine.
I'm a little confused why advpoll runs on custom permissions and doesn't reuse the regular content type permission pattern (create, edit own|any, delete own|any). We should look at webform which perfectly does that.
also am i right that currently there's no way to allow binary votes only to be created for a certain role?
If we would limit permissions by regular pattern per content type that would work fine.

I just wanted to request this change.

Miro, any luck testing and committing this patch? Should I still test it?

Reviews please!
I'm always open for RTBC patches, but please take your time.

there is a small mistake in the patch: in my version of Advanced Poll (6.x-1.x-dev) it's supposed to be also a permission called 'show vote results'.
But this permission does not appear in the patch at all!
Whithout this permission there is no way to see the result of the poll.
So if you edit the patch (adding this permission by hand)... then the patch works.
These are the only 2 rows I edited in the patch:

- return array('create polls', 'edit polls', 'edit own polls', 'vote on polls', 'cancel own vote', 'administer polls', 'inspect all votes', 'show vote results', 'access electoral list', 'add write-ins');

+ return array('create polls', 'edit polls', 'edit own polls', 'vote on polls', 'cancel own vote', 'administer polls', 'inspect all votes', 'show vote results', 'access electoral list', 'add write-ins', 'delete polls', 'delete own polls');

D6 is EOL hence this issue won't be fixed (or) attended. So closing it.