Group role demotion bug

[r-a-y]

On testbp.org, I tried to demote an administrator to member, but got a message saying:

"As the only group administrator, you cannot demote yourself."

I'm not trying to demote myself.

Test case:
​http://testbp.org/groups/ray-fan-group

[apeatling]

(In [2107]) These checks are stopping demotion/banning of any user in a group. Fixes #1334

[r-a-y]

Issue still exists on my test group on testbp.org:
​http://testbp.org/groups/ray-fan-group/

I'm not trying to demote myself.

[apeatling]

Fixed in trunk.