Description:
------------
The pie chart is displayed incorrectly with angle 90 degrees:
(big gaps between the cake pieces)

imagefilledarc($img, 155, 63, 150, 75, 1, 90, $blue, IMG_ARC_PIE);
imagefilledarc($img, 155, 63, 150, 75, 90, 360, $green, IMG_ARC_PIE);


With other angle like 120 degrees there are no problems:

imagefilledarc($img, 155, 63, 150, 75, 1, 120, $blue, IMG_ARC_PIE);
imagefilledarc($img, 155, 63, 150, 75, 120, 360, $green, IMG_ARC_PIE);



Test script:
---------------
<?php
$img = imagecreatetruecolor(440, 123);

$blue = imagecolorallocate($img, 80, 108, 255);
$green = imagecolorallocate($img, 48, 217, 26);

imagefill($img, 0, 0, $white);

imagefilledarc($img, 155, 63, 150, 75, 1, 90, $blue, IMG_ARC_PIE);
imagefilledarc($img, 155, 63, 150, 75, 90, 360, $green, IMG_ARC_PIE);

header('Content-type: image/png');
imagepng($img);
imagedestroy($img);
?>