loplugin:stringconstant

Change-Id: I98c383106c8d5874bc8eb3daf05ca3f172d9f41a
diff --git a/svtools/source/uitest/uiobject.cxx b/svtools/source/uitest/uiobject.cxx
index 8af13ff..6156f44 100644
--- a/svtools/source/uitest/uiobject.cxx
+++ b/svtools/source/uitest/uiobject.cxx
@@ -31,7 +31,7 @@ StringMap TreeListUIObject::get_state()
void TreeListUIObject::execute(const OUString& rAction,
        const StringMap& rParameters)
{
    if (rAction == "")
    if (rAction.isEmpty())
    {
    }
    else