批量修改物料产品时，空值不允许点击更新

git-svn-id: svn+ssh://10.10.101.21/source/platform/platform-b2b@9377 f3bf4e98-0cf0-11e4-a00c-a99a8b9d557d

src/main/webapp/resources/tpl/index/baseInfo/modal/updateByBatch_modal.html

@@ -65,6 +65,6 @@
 	</div> -->
 </div>
 <div class="modal-footer">
-	<button class="btn btn-primary" ng-click="okay()" type="button" ng-disabled="parameter.newvalue == null">确定</button>
+	<button class="btn btn-primary" ng-click="okay()" type="button" ng-disabled="parameter.newvalue == null || parameter.oldvalue == null">确定</button>
 	<button class="btn btn-default" ng-click="cancel()" type="button" ng-if="!changed">取消</button>
 </div>