[2/3] taskschd: Implement getters for IRegistrationInfo string properties.

[Nikolay Sivov]

On 4/11/2014 11:27, Dmitry Timoshkov wrote:
> +    *description = reginfo->description ? SysAllocString(reginfo->description) : NULL;
> +    return S_OK;
SysAllocString(NULL) returns NULL, so no need to handle it separately.