From 096408f44ea833028b4e34a7c2cb5375958aaf7e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20Ka=CC=88fer?= <github@kkaefer.com>
Date: Wed, 29 Jun 2011 14:44:24 +0200
Subject: [PATCH] don't call the callback twice in case it fails

Conflicts:

	lib/mbtiles.js
---
 lib/mbtiles.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/mbtiles.js b/lib/mbtiles.js
index d1737f2..1832656 100644
--- a/lib/mbtiles.js
+++ b/lib/mbtiles.js
@@ -342,10 +342,11 @@ MBTiles.prototype.getGrid = function(z, x, y, callback) {
                         memo[r.key_name] = JSON.parse(r.key_json);
                         return memo;
                     }, {});
-                callback(null, _(JSON.parse(grid)).extend({ data: data }));
             } catch (err) {
-                callback(new Error('Grid is invalid'));
+                return callback(new Error('Grid is invalid'));
             }
+
+            callback(null, _(JSON.parse(grid)).extend({ data: data }));
         }
     );
 };