From 4a213f853c86a308912f7cf2384934ce135a5cf3 Mon Sep 17 00:00:00 2001
From: Mohammed Sameer <msameer@foolab.org>
Date: Sun, 26 Aug 2012 11:46:33 +0300
Subject: [PATCH] Don't try to manipulate the viewfinder renderer if we fail to
 create it.

---
 lib/qtcamgraphicsviewfinder.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/qtcamgraphicsviewfinder.cpp b/lib/qtcamgraphicsviewfinder.cpp
index 76ccad1..342255a 100644
--- a/lib/qtcamgraphicsviewfinder.cpp
+++ b/lib/qtcamgraphicsviewfinder.cpp
@@ -11,6 +11,11 @@ public:
   void ensureBackend() {
     if (!renderer) {
       renderer = QtCamViewfinderRenderer::create(conf, q_ptr);
+      if (!renderer) {
+	qCritical() << "Failed to create a viewfinder renderer";
+	return;
+      }
+
       renderer->resize(q_ptr->size());
       QObject::connect(renderer, SIGNAL(updateRequested()), q_ptr, SLOT(updateRequested()));
     }
@@ -43,6 +48,10 @@ QtCamGraphicsViewfinder::~QtCamGraphicsViewfinder() {
 GstElement *QtCamGraphicsViewfinder::sinkElement() {
   d_ptr->ensureBackend();
 
+  if (!d_ptr->renderer) {
+    return 0;
+  }
+
   return d_ptr->renderer->sinkElement();
 }
 
-- 
2.25.1