Fix maximum callstack when merging two strings

[Mitko-Kerezov]

Whenever trying to merge two string values maximum callstack error is thrown. Fix it by simply returning the second occurrence rather than the first if the type of the values differs from object.

For a simple repro:

function merge_obj(obj, secondObj) {
        if (!obj)
        return secondObj;

         for(var i in secondObj)
             obj[i] = merge_obj(obj[i], secondObj[i]);

         return obj;
}

merge_obj("test", "other")

Ping @alunny for review.

[Mitko-Kerezov]

Ping @alunny, rebased on master

[imhotep]

@Mitko-Kerezov This repository is out of date and no longer maintained. Please head to https://github.com/apache/cordova-node-xcode (as stated in the README.md).