[PATCH] space: fix space_group_id return value

[Vladimir Davydov]

On Tue, Apr 02, 2019 at 08:06:16PM +0300, Vladimir Davydov wrote:
> Should be uint32_t obviously, not bool. This didn't affect anything,
> because there are only two replication groups right now - 0 and 1.
> 
> Spotted by @GeorgyKirichenko.
> 
> Fixes commit f64f46199e19 ("Introduce replica local spaces").
> ---
>  src/box/space.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Trivial, pushed to master.