pgsql: Fix misleading error message context

Fix misleading error message context

Author: Pavel Stehule <pavel.stehule@gmail.com>
Reviewed-by: Stepan Neretin <sncfmgg@gmail.com>
Discussion:
https://www.postgresql.org/message-id/flat/CAFj8pRAw+OkVW=FgMKHKyvY3CgtWy3cWdY7XT+S5TJaTttu=oA@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/4af123ad45bd5e91221983da1152033e6153498c

Modified Files
--------------
src/backend/executor/spi.c                       | 2 +-
src/pl/plpgsql/src/expected/plpgsql_record.out   | 8 ++++----
src/pl/plpgsql/src/expected/plpgsql_varprops.out | 2 +-
src/test/regress/expected/plpgsql.out            | 6 +++---
4 files changed, 9 insertions(+), 9 deletions(-)