Ensure LightShadow.mapSize changes update map

Author: vidartf

js/src/lights/LightShadow.js

@@ -0,0 +1,18 @@
+var _ = require('underscore');
+var LightShadowAutogen = require('./LightShadow.autogen').LightShadowModel;
+
+var LightShadowModel = LightShadowAutogen.extend({
+
+    syncToThreeObj: function(force) {
+        if (force || this.hasChanged('mapSize')) {
+            // The map needs to be recreated!
+            this.obj.map = null;
+        }
+        LightShadowAutogen.prototype.syncToThreeObj.apply(this, arguments);
+    }
+
+});
+
+module.exports = {
+    LightShadowModel: LightShadowModel,
+};