Avoid a PHP notice when trying to access the post_parent
property of hierarchical post type nav menu items.
FIxes #34446 git-svn-id: https://develop.svn.wordpress.org/trunk@35876 602fd350-edb4-49c9-b593-d223f7449a82
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@ -215,7 +215,7 @@ class Walker {
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$top_level_elements = array();
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$top_level_elements = array();
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$children_elements = array();
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$children_elements = array();
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foreach ( $elements as $e) {
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foreach ( $elements as $e) {
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if ( 0 == $e->$parent_field )
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if ( empty( $e->$parent_field ) )
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$top_level_elements[] = $e;
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$top_level_elements[] = $e;
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else
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else
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$children_elements[ $e->$parent_field ][] = $e;
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$children_elements[ $e->$parent_field ][] = $e;
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