From 98414ff8ac59cb78827bcc2d75bfe4a19617239e Mon Sep 17 00:00:00 2001
From: "Justin R. Miller" <incanus@codesorcery.net>
Date: Fri, 2 Nov 2012 12:59:41 -0700
Subject: [PATCH] fix potential crash with empty attribution

---
 MapView/Map/RMAttributionViewController.m | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/MapView/Map/RMAttributionViewController.m b/MapView/Map/RMAttributionViewController.m
index ab34118d0..1cc31eeec 100644
--- a/MapView/Map/RMAttributionViewController.m
+++ b/MapView/Map/RMAttributionViewController.m
@@ -54,7 +54,8 @@ - (id)initWithMapView:(RMMapView *)mapView
                 if ([attribution length])
                     [attribution appendString:@" "];
 
-                [attribution appendString:[tileSource shortAttribution]];
+                if ([tileSource shortAttribution])
+                    [attribution appendString:[tileSource shortAttribution]];
             }
         }