From ed85178d92887f21103350dfe3f11800297799bc Mon Sep 17 00:00:00 2001
From: Bart van den Eijnden <bartvde@boundlessgeo.com>
Date: Wed, 18 Feb 2015 19:59:27 +0100
Subject: [PATCH] Prevent the map from zooming out further than minZoomLevel if
 it is defined on the base layer

---
 lib/OpenLayers/Map.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index 3c11553289..50c5467079 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -2462,7 +2462,13 @@ OpenLayers.Map = OpenLayers.Class({
         if (this.zoomTween) {
             this.zoomTween.stop();
         }
-        this.zoomTo(this.getZoom() - 1);
+        if (this.baseLayer.minZoomLevel !== undefined) {
+            if (this.getZoom() > this.baseLayer.minZoomLevel) {
+                this.zoomTo(this.getZoom() - 1);
+            }
+        } else {
+            this.zoomTo(this.getZoom() - 1);
+        }
     },
 
     /**