Ensure _.zipObject skips falsey elements in a given two dimensional array.

Former-commit-id: 31ce7e65aee98cbed477276ae9115b33fd10c6ea

lodash.js

@@ -4561,7 +4561,7 @@
         var key = keys[index];
         if (values) {
           result[key] = values[index];
-        } else {
+        } else if (key) {
           result[key[0]] = key[1];
         }
       }

test/test.js

@@ -3576,6 +3576,17 @@
 
   /*--------------------------------------------------------------------------*/
 
+  QUnit.module('lodash.zipObject');
+
+  (function() {
+    test('should skip falsey elements in a given two dimensional array', function() {
+      var actual = _.zipObject([['a', 1], ['b', 2]].concat(falsey));
+      deepEqual(actual, { 'a': 1, 'b': 2 });
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
   QUnit.module('lodash(...).shift');
 
   (function() {