Description:
------------
Under windows xp cli version, rand() seems to return cycling values in lower bits.

If i use rand(x,y) the bug does happen only when max_rand+2>y>max_rand+2

mt_rand() is unaffected

Tested same code under linux cli and the bug doesn't happen.

possibly related to http://bugs.php.net/bug.php?id=43108

Reproduce code:
---------------
$a=rand() & 0xff;
for ($k=0;$k<10;$k++) {
	$i=0;
	do {
		$i++;
		$b=rand() & 0xff;
	} while ($a!=$b);
	echo("cycle: $i\n"); 
};

Expected result:
----------------
10 lines with "cycle: x", x being different every line

Actual result:
--------------
cycle: 256
cycle: 256
cycle: 256
cycle: 256
cycle: 256
cycle: 256
cycle: 256
cycle: 256
cycle: 256
cycle: 256

every time