Update src/esui/Select.js

model修改应该在onchange之后，否则如果onchange返回false会导致model更新了但是没有重绘。

Author: Justineo

src/esui/Select.js

@@ -424,17 +424,16 @@ esui.Select.prototype = {
             value = selected.value;
         }
 
-
-        this.selectedIndex = index;
-        this.value = value;
-        
         if (
             opt_isDispatch === true 
             && this.onchange( value, selected ) === false
         ) {
             return;
         }
-        
+
+        this.selectedIndex = index;
+        this.value = value;
+                
         this._repaint();
     },