Merge pull request #60 from idy/issue-37

fix issue #37

Author: c4milo

lib/json2xml.js

@@ -21,7 +21,8 @@ module.exports = function toXml(json, xml) {
     // First pass, extract strings only
     for (var i = 0; i < len; i++) {
         var key = keys[i], value = obj[key], isArray = Array.isArray(value);
-        if (typeof(obj[key]) == 'string' || isArray) {
+        var type = typeof(value);
+        if (type == 'string' || type == 'number' || type == 'boolean' || isArray) {
 			var it = isArray ? value : [value];
 
 			it.forEach(function(subVal) {