fixed that would erroneously pass a zero integer instead of null value

app/node/input.h

@@ -43,7 +43,7 @@ public:
    * saving/loading data from this Node so that parameter order can be changed without issues loading data saved by an
    * older version. This of course assumes that parameters don't change their ID.
    */
-  NodeInput(const QString &id, const DataType& type, const QVariant& default_value = 0);
+  NodeInput(const QString &id, const DataType& type, const QVariant& default_value = QVariant());
 
   virtual bool IsArray();
 

app/render/backend/videorenderworker.cpp

@@ -41,7 +41,6 @@ NodeValueTable VideoRenderWorker::RenderInternal(const NodeDependency& path, con
     emit CompletedFrame(path, job_time, hash, texture);
 
     // If we actually have a texture, download it into the disk cache
-    qDebug() << "Texture was null:" << texture.isNull();
     if (!texture.isNull()) {
       Download(path, hash, texture, frame_cache_->CachePathName(hash));
     }