From b9382aefb2c2fec02002516acca9e0c5bcef763e Mon Sep 17 00:00:00 2001
From: Marco Martin <notmart@gmail.com>
Date: Tue, 22 Oct 2013 13:22:25 +0200
Subject: [PATCH] ensure waitingPanels doesn't have duplicates

---
 src/shell/shellcorona.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/shell/shellcorona.cpp b/src/shell/shellcorona.cpp
index 527c4e8c1..a8598663d 100644
--- a/src/shell/shellcorona.cpp
+++ b/src/shell/shellcorona.cpp
@@ -405,7 +405,9 @@ void ShellCorona::updateScreenOwner(int wasScreen, int isScreen, Plasma::Contain
         containment->formFactor() == Plasma::Types::Vertical) {
 
         if (isScreen >= 0) {
-            d->waitingPanels << containment;
+            if (!d->waitingPanels.contains(containment)) {
+                d->waitingPanels << containment;
+            }
         } else {
             if (d->panelViews.contains(containment)) {
                 d->panelViews[containment]->setContainment(0);