[fixing the build] a new version of eslint is more picky

caravel/assets/visualizations/treemap.js

@@ -72,11 +72,16 @@ function treemap(slice) {
  // We also take a snapshot of the original children (_children) to avoid
  // the children being overwritten when when layout is computed.
  var accumulate = function (d) {
- return (d._children = d.children)
- ? d.value = d.children.reduce(function (p, v) { return p + accumulate(v); }, 0)
- : d.value;
+ var results;
+ if (d._children === d.children) {
+ results = d.children.reduce(function (p, v) { return p + accumulate(v); }, 0);
+ } else {
+ results = d.value;
+ }
+ return results;
  };
 
+
  // Compute the treemap layout recursively such that each group of siblings
  // uses the same size (1x1) rather than the dimensions of the parent cell.
  // This optimizes the layout for the current zoom state. Note that a wrapper