Обсуждение: pgsql: Fix unitialized variables

Fix unitialized variables

As complained by clang, reported by Andres Freund.  Brown paper bag bug
in ccc4c074994d.

Add some comments, too.

Backpatch to 9.5, like that one.

Branch
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REL9_5_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/652ca927ca4d9553691b9c6385111bea353070d8

Modified Files
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src/backend/access/brin/brin_pageops.c |   13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)