Fix #129: updating groups after filterFunction.

A serious bug was introduced in version 1.3.8, causing groups on the
first dimension to be incorrectly calculated after a filterFunction was
called on another dimension.

component.json

@@ -2,7 +2,7 @@
   "name": "crossfilter",
   "repo": "square/crossfilter",
   "description": "Fast n-dimensional filtering and grouping of records.",
-  "version": "1.3.10",
+  "version": "1.3.11",
   "keywords": [],
   "main": "crossfilter.js",
   "scripts": [

crossfilter.js

@@ -1,5 +1,5 @@
 (function(exports){
-crossfilter.version = "1.3.10";
+crossfilter.version = "1.3.11";
 function crossfilter_identity(d) {
   return d;
 }
@@ -825,7 +825,7 @@ function crossfilter() {
           removed = [];
 
       for (i = 0; i < n; ++i) {
-        if (filters[k = index[i]] & one ^ !(x = f(values[i], i))) {
+        if (!(filters[k = index[i]] & one) ^ !!(x = f(values[i], i))) {
           if (x) filters[k] &= zero, added.push(k);
           else filters[k] |= one, removed.push(k);
         }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "crossfilter",
-  "version": "1.3.10",
+  "version": "1.3.11",
   "description": "Fast multidimensional filtering for coordinated views.",
   "keywords": [
     "square",