From 2eb665c63446570e5e5642fbefe21bdd43e02cb9 Mon Sep 17 00:00:00 2001
From: Luke Dashjr <luke-jr+git@utopios.org>
Date: Sat, 14 Apr 2012 21:00:27 -0400
Subject: [PATCH] Bugfix: Check that QRcode_encodeString didn't return NULL (error)

Without this, any error will segfault Bitcoin-Qt
---
 src/qt/qrcodedialog.cpp |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/src/qt/qrcodedialog.cpp b/src/qt/qrcodedialog.cpp
index 9965f14..2a428fb 100644
--- a/src/qt/qrcodedialog.cpp
+++ b/src/qt/qrcodedialog.cpp
@@ -41,6 +41,11 @@ void QRCodeDialog::genCode()
         ui->lblQRCode->setText("");
 
         QRcode *code = QRcode_encodeString(uri.toUtf8().constData(), 0, QR_ECLEVEL_L, QR_MODE_8, 1);
+        if (!code)
+        {
+            ui->lblQRCode->setText(tr("Error encoding URI into QR Code."));
+            return;
+        }
         myImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32);
         myImage.fill(0xffffff);
         unsigned char *p = code->data;
-- 
1.7.1