pgsql: Search for SLRU page only in its own bank

Search for SLRU page only in its own bank

One of the two slot scans in SlruSelectLRUPage was not walking only the
slots in the specific bank where the buffer could be; change it to do
that.

Oversight in 53c2a97a9266.

Author: Sergey Sargsyan <sergey.sargsyan.2001@gmail.com>
Discussion: https://postgr.es/m/18582-5f301dd30ba91a38@postgresql.org

Branch
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REL_17_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/fad0da271e006015fcc25724aca2871d6dec04f5

Modified Files
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src/backend/access/transam/slru.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)