Обсуждение: pgsql: Put back our old workaround for machines that declare cbrt() in

Log Message:
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Put back our old workaround for machines that declare cbrt() in math.h but
fail to provide the function itself.  Not sure how we escaped testing anything
later than 7.3 on such cases, but they still exist, as per Andr� Volpato's
report about AIX 5.3.

Tags:
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REL7_4_STABLE

Modified Files:
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    pgsql/src/backend/utils/adt:
        float.c (r1.94 -> r1.94.2.1)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/float.c?r1=1.94&r2=1.94.2.1)