Changes in functions bittoint4 and bitfromint4 - Function bit does not work

Functions bittoint4 and bitfromint4 are renamed to int4 and bit respectively.
Int4 works well, but bit conflicts with type bit.

    =# select int4(B'111');
     int4
    ------
        7
    (1 row)

    =# select bit(7);
    ERROR:  parser: parse error at or near ";" at character 14
    =#

Following trial change of bki enables 'bit' function.

    insert OID = 1683 ( bitx 11 1 12 f f t f i 1 1560 "23" bitfromint4 - _null_ )


    =# select bitx(7);
           bitx
    ----------------------------------
     00000000000000000000000000000111
    (1 row)

    =#


Kenji Sugita