Noah Misch 49c279efe7 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.

2014-07-06 00:30:11 -04:00

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