Tal Levy 13944b1bf9 Fix max-int limit for number of points reduced in geo_centroid (#56370)
A bug in InternalGeoCentroid#reduce existed that summed up
the aggregation's long-valued counts into a local integer variable.
Since it is definitely possible to reduce more than Integer.MAX points,
this change simply updates that variable to be a long-valued number.

Closes #55992.
2020-05-07 14:30:29 -07:00
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