pgsql: Tweak streamutil.c further to avoid scan-build warning

Tweak streamutil.c further to avoid scan-build warning

The previous change added a new scan-build warning about need_password
assigned but not read.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/f4482a542c30034c7871fd35050128823ef5c6d5

Modified Files
--------------
src/bin/pg_basebackup/streamutil.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

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