oledb32: Add IDataSourceLocator support (try 6)

[Nikolay Sivov]

On 8/21/2013 10:33, Alistair Leslie-Hughes wrote:
> +typedef struct DataSourceImpl
> +{
> +    IDataSourceLocator     IDataSourceLocator_iface;
> +    LONG ref;
> +
> +} DataSourceImpl;
All good, except this one.