From 9c50bb5c01475bed7f19f42d7a2453c3f86dcaf8 Mon Sep 17 00:00:00 2001
From: ahocevar <andreas.hocevar@gmail.com>
Date: Fri, 16 Dec 2011 11:22:31 +0100
Subject: [PATCH] Don't set the new lonlat if the new zoom is not valid.

This avoids unwanted panning without zooming when using the mousewheel to zoom out on a wrapDateLine map (see #109).
---
 lib/OpenLayers/Map.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index adf2fc25d1..45a21a57e6 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -1749,7 +1749,12 @@ OpenLayers.Map = OpenLayers.Class({
             }
         }
         if (this.baseLayer.wrapDateLine) {
+            var requestedZoom = zoom;
             zoom = this.adjustZoom(zoom);
+            if (zoom !== requestedZoom) {
+                // zoom was adjusted, so keep old lonlat to avoid panning
+                lonlat = this.getCenter();
+            }
         }
         // dragging is false by default
         var dragging = options.dragging || this.dragging;