Commit92647fc

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Avoid possible divide-by-zero in gincostestimate.

Per report from Jeff Janes.

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Original file line number	Diff line number	Diff line change
`@@ -6458,6 +6458,10 @@ gincostestimate(PG_FUNCTION_ARGS)`
`6458`	`6458`	`numDataPages=Min(numDataPages,numPages-numEntryPages);`
`6459`	`6459`	`}`
`6460`	`6460`
	`6461`	`+/* In an empty index, numEntries could be zero. Avoid divide-by-zero */`
	`6462`	`+if (numEntries<1)`
	`6463`	`+numEntries=1;`
	`6464`	`+`
`6461`	`6465`	`/*`
`6462`	`6466`	`* Include predicate in selectivityQuals (should match`
`6463`	`6467`	`* genericcostestimate)`

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