Description:
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I use a selfcompiled version from PHP Version 5.1.0RC5-dev

Only vertical lines you can create, the horizontal lines are not visible

Reproduce code:
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<?
$pic = ImageCreate (150, 50);
$bg = ImageColoralLocate($pic, 230,230,230);
$dl = ImageColoralLocate($pic, 50, 50, 50);

ImageDashedLine($pic, 1, 36, 149, 36, $dl); // don't work

imageDashedline($pic, 37, 2, 37, 49, $dl); // works
header('Content-Type: image/jpeg');
imagegif($pic);			
?>

Expected result:
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You can only show the vertical lines!!!

Actual result:
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PHP don't crash!!