cherry-pick to master

[Jon TURNEY]

On 13/10/2009 20:59, Jeremy Huddleston wrote:
> Hi Keith,
>
> Can you please pull these two commits into master:
>
> 6980f77892e0409b44bd8f33ba82e7273c6462a4
> 7e178ffbed7c8557faf8d471ad275aa2b0365e1d
>
[...]
>
> There is some confusion as to if RootlesscolormapCallback() returns a
> Bool or
> xp_error_enum value (not so abstact), but I have no way of checking, of
> finding
> out if Xplugin actually checks the result :-)

You can probably remove that remark from the comment.  There is no confusion 
any more, thanks to your clarification :-)