Description:
------------
When doing a imagefilledarc where the start and end angle are the same 
the angle is ignored and zero is used instead.

Just upgraded from PHP 5.1.4 to 5.2.11 
Using 5.1.4 the function would correctly position a line at the request 
angle with 5.2.11 zero is always used.

the start and end must be at least 1 degree different to produce the 
correct result.

Reproduce code:
---------------
---
From manual page: function.imagefilledarc#Description
---

<?php
$img = imagecreate(200, 200);
$white = imagecolorallocate($img, 255, 255, 255);
$blue = imagecolorallocate($img, 153, 204, 255);
$black = imagecolorallocate($img, 0, 0, 0);
imagefilledarc($img, 100, 100, 175, 175,0,360, $blue,IMG_ARC_PIE);
imagefilledarc($img, 100, 100, 175, 175, 150,150, $black,IMG_ARC_PIE|IMG_ARC_NOFILL |IMG_ARC_EDGED);
header("Content-type: image/png");
imagepng($img);
imagedestroy($img);
?>


Expected result:
----------------
blue circle with black line drawn at 150degrees

Actual result:
--------------
blue circle with black line drawn at 0degrees