From 5fb67414d2108445565bc406bda4c98c624ece44 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Thu, 10 Sep 2015 10:38:54 +0200
Subject: [PATCH] [libkwineffects] Proper no-size check in
 WindowQuadList::splitAt(X|Y)

A quad might have a null size in case it has a null width or null height.
Not just one dimension.

BUG: 236353
BUG: 210467
FIXED-IN: 5.4.2
REVIEW: 125131
---
 libkwineffects/kwineffects.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libkwineffects/kwineffects.cpp b/libkwineffects/kwineffects.cpp
index 41f091f6f0..fe6a27be2e 100644
--- a/libkwineffects/kwineffects.cpp
+++ b/libkwineffects/kwineffects.cpp
@@ -1008,7 +1008,7 @@ WindowQuadList WindowQuadList::splitAtX(double x) const
             ret.append(quad);
             continue;
         }
-        if (quad.left() == quad.right()) { // quad has no size
+        if (quad.top() == quad.bottom() || quad.left() == quad.right()) { // quad has no size
             ret.append(quad);
             continue;
         }
@@ -1040,7 +1040,7 @@ WindowQuadList WindowQuadList::splitAtY(double y) const
             ret.append(quad);
             continue;
         }
-        if (quad.top() == quad.bottom()) { // quad has no size
+        if (quad.top() == quad.bottom() || quad.left() == quad.right()) { // quad has no size
             ret.append(quad);
             continue;
         }