rbbt.basic.js in rbbt-rest-1.7.19

- old
+ new

@@ -19,12 +19,11 @@
   if (undefined === timeout) timeout = 1000
   if (timeout > 20000) timeout = 20000
 
   params.extract = function(xhr, xhrOptions){
     if (xhr.status != '200') throw(xhr)
-    return xhr.responseText
+    return xhr.responseText.length === 0 && xhrOptions.deserialize === JSON.parse ? null : xhr.responseText
   }
-
 
   rbbt.ajax(params).then(
     function(res){
       deferred.resolve(res)
     }, 