Description:
------------
When provided a pattern that produces a zero-width match, mb_ereg_search increments search position by one, eventhough it shouldn't.



Test script:
---------------
<?php

mb_ereg_search_init('foo');

var_dump(mb_ereg_search('\A'));
var_dump(mb_ereg_search_getpos());

var_dump(mb_ereg_search('\s*'));
var_dump(mb_ereg_search_getpos());

var_dump(mb_ereg_search('\w+'));
var_dump(mb_ereg_search_getpos());
var_dump(mb_ereg_search_getregs());

var_dump(mb_ereg_search('\s*'));
var_dump(mb_ereg_search_getpos());

var_dump(mb_ereg_search('\Z'));
var_dump(mb_ereg_search_getpos());


Expected result:
----------------
bool(true)
int(0)

bool(true)
int(0)

bool(true)
int(3)
array(1) {
  [0]=>
  string(1) "foo"
}

bool(true)
int(3)

bool(true)
int(3)

Actual result:
--------------
// warnings suppressed, see bug #72691

bool(true)
int(1)

bool(true)
int(2)

bool(true)
int(3)
array(1) {
  [0]=>
  string(1) "o"
}

bool(true)
int(4)

bool(false)
int(3)