fix panAnimation

Author: fuzhenn

src/map/Map.Pan.js

@@ -59,9 +59,6 @@ Map.include(/** @lends Map.prototype */ {
     },
 
     _panAnimation: function (target, t, cb) {
-        if (!this.options['panAnimation']) {
-            return this.setCenter(target);
-        }
         return this.animateTo({
             'center' : target
         }, {

src/map/handler/Map.Drag.js

@@ -132,7 +132,7 @@ class MapDragHandler extends Handler {
 
         this._clear();
 
-        if (!param.interupted && map._verifyExtent(map.getCenter()) && t < 280 && Math.abs(dy) + Math.abs(dx) > 5) {
+        if (map.options['panAnimation'] && !param.interupted && map._verifyExtent(map.getCenter()) && t < 280 && Math.abs(dy) + Math.abs(dx) > 5) {
             t = 5 * t * (Math.abs(dx) + Math.abs(dy)) / 500;
             map.panBy(new Point(dx, dy), { 'duration' : t });
         } else {