Update GRID.vue.ftl

@CONTROL/视图布局面板/@MACRO/GRID.vue.ftl

 <#ibizinclude>../../@MACRO/FUNC/MACRO.ftl</#ibizinclude>
 <#assign MDContent><#t>
-<#if view.getPSSysCounterRef() ?? && view.getPSSysCounterRef().getPSAppCounter()??>
+<#if view.getPSSysCounterRef?? && view.getPSSysCounterRef() ?? && view.getPSSysCounterRef().getPSAppCounter()??>
 <#assign appCounter = view.getPSSysCounterRef().getPSAppCounter() />
 </#if>
   <#if view.getViewType() == "DEGRIDVIEW9">