pgsql: Further fix for psql's code for locale-aware formatting of numer

Further fix for psql's code for locale-aware formatting of numeric output.

(Third time's the charm, I hope.)

Additional testing disclosed that this code could mangle already-localized
output from the "money" datatype. We can't very easily skip applying it
to "money" values, because the logic is tied to column right-justification
and people expect "money" output to be right-justified. Short of
decoupling that, we can fix it in what should be a safe enough way by
testing to make sure the string doesn't contain any characters that would
not be expected in plain numeric output.

Branch
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REL9_5_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/5eb7024379ec0701ce2fae242ae90d7d56ee72bb

Modified Files
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src/bin/psql/print.c | 30 +++++++++++++++++++++++-------
1 file changed, 23 insertions(+), 7 deletions(-)