Fix typo

src/bootstrap-table.js

@@ -185,8 +185,9 @@
         var getOwnPropertyNames = Object.getOwnPropertyNames || function (obj) {
             var arr = [];
             for (var k in obj) {
-            if (obj.hasOwnProperty(k)) {
-                arr.push(k);
+                if (obj.hasOwnProperty(k)) {
+                    arr.push(k);
+                }
             }
             return arr;
         };