Pull request #1481: 无JIRA任务 bugfix

Merge in VISUAL/fineui from ~GUY/fineui:master to master

* commit '5a28fcd0e79b79bdd916ee3f04e59e4dc5add5a0':
  bugfix

src/base/single/text.js

@@ -106,6 +106,9 @@
             var o = this.options;
             var text = BI.isFunction(o.text) ? o.text() : o.text;
             text = BI.isKey(text) ? text : o.value;
+            if (!BI.isKey(text)) {
+                return "";
+            }
             return BI.Text.formatText(text + "");
         },