Avoid division by zero.

1 files changed, 1 insertions, 1 deletions

diff --git a/openglscene.cpp b/openglscene.cpp
index 05e8ca3..adc442e 100644
--- a/openglscene.cpp
+++ b/openglscene.cpp
@@ -339,7 +339,7 @@ void OpenGLScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
         return;
 
     const unsigned int delta = m_time.elapsed() - m_startTime;
-    m_angle = m_accumulated / (delta / 1000.0);
+    m_angle = delta ? m_accumulated / (delta / 1000.0) : 0;
 
     event->accept();
     m_rotating = false;