Обсуждение: pgsql: Consistently pass an "unsigned char" to ctype.h functions.

Consistently pass an "unsigned char" to ctype.h functions.

The isxdigit() calls relied on undefined behavior.  The isascii() call
was well-defined, but our prevailing style is to include the cast.
Back-patch to 9.4, where the isxdigit() calls were introduced.

Branch
------
REL9_4_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/49c279efe7858454114bd304444e95573be0804b

Modified Files
--------------
contrib/pg_upgrade/controldata.c |    2 +-
src/backend/utils/adt/json.c     |    7 +++++--
2 files changed, 6 insertions(+), 3 deletions(-)