pgsql: Usage of isnan() in ECPG regression tests probably needs

Log Message:
-----------
Usage of isnan() in ECPG regression tests probably needs '#include <float.h>' as well.

Modified Files:
--------------
    pgsql/src/interfaces/ecpg/test/expected:
        pgtypeslib-nan_test.c (r1.2 -> r1.3)

(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/pgtypeslib-nan_test.c?r1=1.2&r2=1.3)
        pgtypeslib-nan_test.stderr (r1.3 -> r1.4)

(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/pgtypeslib-nan_test.stderr?r1=1.3&r2=1.4)
    pgsql/src/interfaces/ecpg/test/pgtypeslib:
        nan_test.pgc (r1.2 -> r1.3)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/pgtypeslib/nan_test.pgc?r1=1.2&r2=1.3)