Merge pull request mysqljs#613 from rwky/master

Fixed mysqljs#588 missing variable declaration

Author: felixge

lib/PoolCluster.js

@@ -64,6 +64,7 @@ PoolCluster.prototype.add = function(id, config) {
 };
 
 PoolCluster.prototype.getConnection = function(pattern, selector, cb) {
+  var namespace;
   if (typeof pattern === 'function') {
     cb = pattern;
     namespace = this.of();