hasOwnProperty instead of falsey check, closes #37

Author: nlf

lib/parse.js

@@ -29,7 +29,7 @@ internals.parseValues = function (str, options) {
             var key = Utils.decode(part.slice(0, pos));
             var val = Utils.decode(part.slice(pos + 1));
 
-            if (!obj[key]) {
+            if (!obj.hasOwnProperty(key)) {
                 obj[key] = val;
             }
             else {

test/parse.js

@@ -190,6 +190,7 @@ describe('#parse', function () {
 
         expect(Qs.parse('a[]=b&a[]=&a[]=c')).to.deep.equal({ a: ['b', '', 'c'] });
         expect(Qs.parse('a[0]=b&a[1]=&a[2]=c&a[19]=')).to.deep.equal({ a: ['b', '', 'c', ''] });
+        expect(Qs.parse('a[]=&a[]=b&a[]=c')).to.deep.equal({ a: ['', 'b', 'c'] });
         done();
     });