Commitb38006e

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Fix formula in _hash_spareindex.

This was correct in earlier versions of the patch that lead tocommitea69a0d, but somehow gotbroken in the last version which I actually committed.Mithun Cy, per an off-list report from Ashutosh SharmaDiscussion:http://postgr.es/m/CAD__OujbAwNU71v1y-RoQxZ8LZ6-V2UFTkex3v34MK6uZ3Xb5w@mail.gmail.com

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Original file line number	Diff line number	Diff line change
`@@ -174,7 +174,8 @@ _hash_spareindex(uint32 num_bucket)`
`174`	`174`
`175`	`175`	`/* account for phases within current group */`
`176`	`176`	`splitpoint_phases+=`
`177`		`-(((num_bucket-1) >> (HASH_SPLITPOINT_PHASE_BITS+1))&`
	`177`	`+(((num_bucket-1) >>`
	`178`	`+ (splitpoint_group- (HASH_SPLITPOINT_PHASE_BITS+1)))&`
`178`	`179`	`HASH_SPLITPOINT_PHASE_MASK);/* to 0-based value. */`
`179`	`180`
`180`	`181`	`returnsplitpoint_phases;`

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