Fix parent position when walking child nodes

The child node needs to know its parent's absolute position in order to determine its own absolute position. Previously, the parent's relative position (in relation to its own parent) has been passed. This leads to wrong positioning of nested nodes after several levels of recursion. I fixed this by passing the current node's absolute position to the child nodes' layout function.

Author: mbrgm

lib/layoutNode.js

@@ -37,7 +37,7 @@ function walkNode (node, parentLeft, parentTop) {
  node.layer.frame.height = node.layout.height;
  if (node.children && node.children.length > 0) {
  node.children.forEach(function (child) {
- walkNode(child, node.layout.left, node.layout.top);
+ walkNode(child, node.layer.frame.x, node.layer.frame.y);
  });
  }
 }