Обсуждение: pgsql: xmlGetUTF8Char()'s second argument is both input and output.

Log Message:
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xmlGetUTF8Char()'s second argument is both input and output.  Fix
uninitialized value, and avoid invoking the function nine separate
times in the pg_xmlIsNameChar macro.  Should resolve buildfarm failures.
Per report from Ben Leslie.

Modified Files:
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    pgsql/src/backend/utils/adt:
        xml.c (r1.54 -> r1.55)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/xml.c?r1=1.54&r2=1.55)