update build and changelog

CHANGELOG.md

@@ -16,6 +16,7 @@ An in-progress version being developed on the master branch.
  * Added optional `delta` argument to `Map` `zoomIn` and `zoomOut` (1 by default).
  * Improved scroll wheel zoom to be more responsive.
  * Improved vectors updating/removing on Canvas backend even more (by [@danzel](https://github.com/danzel)). [#961](https://github.com/CloudMade/Leaflet/pull/961)
+ * Added `isValid` method to `LatLngBounds` and `Bounds` (by [@domoritz](https://github.com/domoritz)). [#972](https://github.com/CloudMade/Leaflet/pull/972)
 
 ### Bugfixes
 

dist/leaflet-src.js

@@ -609,8 +609,11 @@ L.Bounds = L.Class.extend({
 			yIntersects = (max2.y >= min.y) && (min2.y <= max.y);
 
 		return xIntersects && yIntersects;
-	}
+	},
 
+	isValid: function () {
+		return !!(this.min && this.max);
+	}
 });
 
 L.bounds = function (a, b) { // (Bounds) or (Point, Point) or (Point[])
@@ -1064,6 +1067,10 @@ L.LatLngBounds = L.Class.extend({
 
 		return this._southWest.equals(bounds.getSouthWest()) &&
 		       this._northEast.equals(bounds.getNorthEast());
+	},
+
+	isValid: function () {
+		return !!(this._southWest && this._northEast);
 	}
 });