pgsql: Tweak PQresStatus() to avoid a clang compiler warning.

Tweak PQresStatus() to avoid a clang compiler warning.

The previous test for status < 0 test is in fact testing nothing if the
compiler considers an enum to be an unsigned data type.  clang doesn't
like tautologies, so do this instead.

Report by Peter Geoghegan, fix as suggested by Tom Lane.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/b43bf617fdb3ecde709892c3bd8997ac41410f2f

Modified Files
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src/interfaces/libpq/fe-exec.c |    2 +-
1 files changed, 1 insertions(+), 1 deletions(-)