pgsql: When passing query strings to workers, pass the terminating \0.

When passing query strings to workers, pass the terminating \0.

Otherwise, when the query string is read, we might trailing garbage
beyond the end, unless there happens to be a \0 there by good luck.

Report and patch by Thomas Munro. Reviewed by Rafia Sabih.

Discussion: http://postgr.es/m/CAEepm=2SJs7X+_vx8QoDu8d1SMEOxtLhxxLNzZun_BvNkuNhrw@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/f94eec490b2671399c102b89c9fa0311aea3a39f

Modified Files
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src/backend/executor/execParallel.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)