Update index.js

Author: dkarpman

lib/index.js

@@ -48,8 +48,9 @@ PG.prototype.connect = function(config, callback) {
   var client = new this.Client(config);
   // Max connections waiting to connect
   this.num_connections++;
+  var _this = this;
   client.connect(function(err) {
-    this.num_connections--;
+    _this.num_connections--;
     if(err) {
       return callback && callback(err);
     }