randr: stop immutable output properties from being deleted (v2)

[Rami Ylimäki]

On 08/24/2011 01:26 AM, Luc Verhaegen wrote:
> On Wed, Aug 24, 2011 at 12:19:58AM +0200, Luc Verhaegen wrote:
>> This version of the server side patch now no longer mangles the output
>> properties list directly. This incurs a slight bit of overhead, in what is
>> an extremely low frequency path anyway. It also fixes the error thrown in
>> case the property does not exist for the listed output, to match
>> QueryOutputProperty.
>>
>> The new version of the randrproto.txt patch now fixes the two issues daniels
>> spotted and now fully documents all the errors that RRDeleteOutputProperty
>> might throw.
>>
>> Luc Verhaegen.
>  From master this applied to the n9's xserver 1.9.5 tree cleanly, and was
> built and tested succesfully.
>
> Luc Verhaegen.

Bumping this thread up because I'd like to see these changes committed.

Reviewed-by: Rami Ylimäki <rami.ylimaki at vincit.fi>