Re: Fix for seg picksplit function

Hello Yeb,

Thank you for review and code refactoring.

PS: when comparing with gbt_num_picksplit, I noticed that that one does not
> update v->spl_ldatum and spl_rdatum to the union datums, but initializes
> these to 0 at the beginning and never seems to update them. Not sure if this
> is a problem since the num_picksplit stuff seems to work well.
>
Actually gbt_num_picksplit updates v->spl_ldatum and spl_rdatum
inside gbt_num_bin_union function.

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With best regards,
Alexander Korotkov.