Description:
------------
dbase_create(), dbase_add_record() and dbase_replace_record()
modify their array argument, albeit passed by value, if a string
is expected, but a compatible type is given.


Test script:
---------------
<?php
$def = array([17, 'C', 10]);
$dbh = dbase_create('test.dbf', $def);
var_dump($def);
$record = [4];
dbase_add_record($dbh, $record);
dbase_close($dbh);
var_dump($record);
?>


Expected result:
----------------
array(1) {
  [0]=>
  array(3) {
    [0]=>
    int(17)
    [1]=>
    string(1) "C"
    [2]=>
    int(10)
  }
}
array(1) {
  [0]=>
  int(4)
}

Actual result:
--------------
array(1) {
  [0]=>
  array(3) {
    [0]=>
    string(2) "17"
    [1]=>
    string(1) "C"
    [2]=>
    int(10)
  }
}
array(1) {
  [0]=>
  string(1) "4"
}