problem in getValue gave spurious nulls

check for existance failed if value evaluates to false (0, null, false, undefined etc.)

Author: lingwooc

index.js

@@ -25,7 +25,7 @@ exports.DataTransform = function(data, map){
 				keys = key.split('.');
 				for(var i = 0; i < keys.length; i++ ) {
 					if(typeof(value) !== "undefined" && 
-						value[keys[i]]) {
+						keys[i] in value) {
 						value = value[keys[i]];
 					} else {
 						return null;

test/complexTemplate.js

@@ -6,6 +6,7 @@ let map = {
 	item: {
 		id: 'id',
 		sku: 'sku',
+		zero: 'zero',
 		toReplace: 'sku',
 		errorReplace: 'notFound',
 		simpleArray: ['id', 'sku','sku'],
@@ -44,6 +45,7 @@ let map = {
 let object ={
 	items:[{
 	id: 'books',
+	zero: 0,
 	sku:'10234-12312'
 	}]
 }