pgsql: Fix backwards test for Windows service-ness in pg_ctl.

Fix backwards test for Windows service-ness in pg_ctl.

A thinko in a96761391 caused pg_ctl to get it exactly backwards when
deciding whether to report problems to the Windows eventlog or to stderr.
Per bug #14001 from Manuel Mathar, who also identified the fix.
Like the previous patch, back-patch to all supported branches.

Branch
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REL9_5_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/45b87cc57fe02f571de33ce20b4d7bec881a785a

Modified Files
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src/bin/pg_ctl/pg_ctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)