fix(treeTable): 表格删除所有行之后，全选按钮选中的问题 (#1759)

src/modules/treeTable.js

@@ -1622,6 +1622,8 @@ layui.define(['table'], function (exports) {
     data = data.filter(function (item) {
         return !item[options.disabledName];
     });
+
+    if(data.length > 0){
       layui.each(data, function (i1, item1) {
         if (item1[checkName] || item1[LAY_CHECKBOX_HALF]) {
           isIndeterminate = true;
@@ -1633,6 +1635,10 @@ layui.define(['table'], function (exports) {
           return true;
         }
       })
+    }else{
+      isAll = false;
+    }
+    
     isIndeterminate = isIndeterminate && !isAll;
     form.render(tableView.find('input[name="layTableCheckbox"][lay-filter="layTableAllChoose"]').prop({
       'checked': isAll,