From 47993d39b3a2bec45901c1c0f787614900e2a122 Mon Sep 17 00:00:00 2001
From: "Aaron J. Seigo" <aseigo@kde.org>
Date: Thu, 19 Nov 2009 00:17:29 +0000
Subject: [PATCH] return the null engine when a QString() engine() is requested

svn path=/trunk/KDE/kdelibs/; revision=1051211
---
 dataenginemanager.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dataenginemanager.cpp b/dataenginemanager.cpp
index c0f50df4d..126285e3e 100644
--- a/dataenginemanager.cpp
+++ b/dataenginemanager.cpp
@@ -95,6 +95,10 @@ DataEngineManager::~DataEngineManager()
 
 Plasma::DataEngine *DataEngineManager::engine(const QString &name) const
 {
+    if (name.isEmpty()) {
+        return d->nullEngine();
+    }
+
     Plasma::DataEngine::Dict::const_iterator it = d->engines.constFind(name);
     if (it != d->engines.constEnd()) {
         // ref and return the engine