qml: Fix leak of the OpenGL contexts

[Matthew Waters]: add NULL checks before unreffing

https://bugzilla.gnome.org/show_bug.cgi?id=762999

diff --git a/ext/qt/qtitem.cc b/ext/qt/qtitem.cc
index 57b7bc9..e1f91e7 100644 (file)
--- a/ext/qt/qtitem.cc
+++ b/ext/qt/qtitem.cc
@@ -172,7 +172,10 @@ QtGLVideoItem::QtGLVideoItem()
 QtGLVideoItem::~QtGLVideoItem()
 {
   g_mutex_clear (&this->priv->lock);
-
+  if (this->priv->context)
+    gst_object_unref(this->priv->context);
+  if (this->priv->other_context)
+    gst_object_unref(this->priv->other_context);
   g_free (this->priv);
   this->priv = NULL;
 }