[PATCH] riched20: Return E_INVALIDARG from ITextServices::TxGetText on null output.

[Huw Davies]

> On 26 Apr 2018, at 11:33, Jactry Zeng <jactry92 at gmail.com> wrote:
> 
> Huw Davies <huw at codeweavers.com> 于2018年4月26日周四 下午6:11写道：
> 
>> Does an application actually need this?
> 
> No, just noticed this when writing tests for TxGetNaturalSize.

We don’t really want these sort of checks unless they’re actually
required.

Huw.