note 25728 added to function.imagearc

It seems that imagearc() function encounters trouble with negative angles, it draws garbage. Another annoying point is that the trigonometric sense (thus anti-clockwise) is not respected. Ellipses are drawn in clockwise sense. -- http://www.php.net/manual/en/function.imagearc.php http://master.php.net/manage/user-notes.php?action=edit+25728 http://master.php.net/manage/user-notes.php?action=delete+25728 http://master.php.net/manage/user-notes.php?action=reject+25728