Description:
------------
count counts one element to much on a freshly created array, goes to 
normal behaviour after unset()


(apache newest stable, php newest stable, fresh setup just to confirm 
the bug, windows 7)

Reproduce code:
---------------
<?php
$sockets = array(0,1,2,3,4,5);
for($i=0,$j=count($sockets);$i<$j;++$i)echo $sockets[$i];
echo '<br>';
for($i=0,$j=count($sockets)+1;$i<$j;++$i)echo $sockets[$i];
echo '<hr>';
unset($sockets[3]);
for($i=0,$j=count($sockets);$i<$j;++$i)echo $sockets[$i];
echo '<br>';
for($i=0,$j=count($sockets)+1;$i<$j;++$i)echo $sockets[$i];
?>

Expected result:
----------------
01234<br>012345<hr>0124<br>01245

Actual result:
--------------
012345<br>012345<hr>0124<br>01245