[gnome-maps] mapLocation: make sure bbox is valid

[Jonas Danielsson <jonasdn src gnome org>]

commit cb07bae3d96da61d28cae8bb4dafe67ce1c05c98
Author: Jonas Danielsson <jonas threetimestwo org>
Date:   Tue Feb 4 19:39:28 2014 +0100

    mapLocation: make sure bbox is valid
    
    If the bounding box from Nominatim is not a valid Champlain
    bounding box the ensure_visible call will fail. Then we will never
    get the animation-completed signal.

 src/mapLocation.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/mapLocation.js b/src/mapLocation.js
index c01029c..b6ec9c1 100644
--- a/src/mapLocation.js
+++ b/src/mapLocation.js
@@ -178,7 +178,7 @@ const MapLocation = new Lang.Class({
     },
 
     _ensureVisible: function(fromLocation) {
-        if (this.bbox !== null) {
+        if (this.bbox !== null && this.bbox.is_valid()) {
             let visibleBox = this.bbox.copy();
 
             visibleBox.extend(fromLocation.latitude, fromLocation.longitude);