msvcp140: implement _To_byte

[Nikolay Sivov]

On 09.07.2017 14:00, Nikolay Sivov wrote:
> On 09.07.2017 13:42, Stefan Dösinger wrote:
>>
>>> +    if (!src || !dst)
>>> +        return 0;
>> This is redundant. WideCharToMultiByte checks this for you and returns
>> 0. I noticed this after sending the _To_wide patch and will send a patch
>> removing the redundant check from _To_wide.
>>
>>
> 
> Checking 'dst' is not redundant though.
> 

Ah, maybe it is, because destination buffer length is never zero.