Fixed an error on the function "groups_get_tree"
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@ -1553,7 +1553,7 @@ function groups_get_tree(&$groups, $parent = false) {
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$return = array();
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foreach ($groups as $id => $group) {
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if ($parent === false && (!isset($group['parent']) || $group['parent'] == 0)) {
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if ($parent === false && (!isset($group['parent']) || $group['parent'] == 0 || !in_array($group['parent'], $groups))) {
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$return[$id] = $group;
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unset($groups[$id]);
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$children = groups_get_tree($groups, $id);
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