fix recognition of query format for empty queries in dictionary format

queries like {text: ""} did not get recognized correctly before and
get converted to {text: {text: ""}}

Author: AlexanderS

lib/client.js

@@ -172,7 +172,7 @@ p._pulseQueryQueue = function() {
 
 p.query = function(config, values, callback) {
   //can take in strings or config objects
-  config = (config.text || config.name) ? config : { text: config };
+  config = (typeof(config) == 'string') ? { text: config } : config;
 
   if(values) {
     if(typeof values === 'function') {