From 63f48d00aaa51bc892d6381b43d57a6bc55afced Mon Sep 17 00:00:00 2001
From: Laszlo Agocs <laszlo.agocs@digia.com>
Date: Mon, 25 Aug 2014 16:53:05 +0200
Subject: [PATCH] Initialize textureId in platform backing store

Setting it initially to 0 is very important, otherwise we will
do a glDeleteTextures with the undefined value.

The result sometimes goes unnoticed and sometimes causes bizarre
issues: For example in the 'textures' example one face of one cube
out of the six did go blank from time to time since the corresponding
texture was deleted by the backingstore.

Change-Id: Iebf68e20b2af426c979980d8bc4449db2b98f2f0
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
---
 src/gui/painting/qplatformbackingstore.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gui/painting/qplatformbackingstore.cpp b/src/gui/painting/qplatformbackingstore.cpp
index 5b6c4bb83d..0fe883cf2b 100644
--- a/src/gui/painting/qplatformbackingstore.cpp
+++ b/src/gui/painting/qplatformbackingstore.cpp
@@ -62,6 +62,7 @@ public:
     QPlatformBackingStorePrivate(QWindow *w)
         : window(w)
 #ifndef QT_NO_OPENGL
+        , textureId(0)
         , blitter(0)
 #endif
     {