Allow use headers in C++.

[Mike Snitzer <snitzer@redhat.com>]

On Mon, Jun 14 2010 at 12:20pm -0400,
Milan Broz <mbroz@redhat.com> wrote:

> Remove C++ private keyword from header.
...
> diff --git a/libdm/libdm-report.c b/libdm/libdm-report.c
> index e13115a..2b044b5 100644
> --- a/libdm/libdm-report.c
> +++ b/libdm/libdm-report.c
> @@ -566,7 +566,7 @@ struct dm_report *dm_report_init(uint32_t *report_types,
>  				 const char *output_separator,
>  				 uint32_t output_flags,
>  				 const char *sort_keys,
> -				 void *private)
> +				 void *private_data)
>  {
>  	struct dm_report *rh;
>  	const struct dm_report_object_type *type;
> @@ -588,7 +588,7 @@ struct dm_report *dm_report_init(uint32_t *report_types,
>  	rh->separator = output_separator;
>  	rh->fields = fields;
>  	rh->types = types;
> -	rh->private = private;
> +	rh->private = private_data;
>  
>  	rh->flags |= output_flags & DM_REPORT_OUTPUT_MASK;

Should struct dm_report's "private" be renamed too?