video_input: fix crash when the video input is stopped during EBUSY state

Change-Id: If77d5cd33aae4607975caca46fd0a9f649975a54
Gitlab: #233

src/media/video/video_input.cpp

@@ -294,6 +294,9 @@ VideoInput::createDecoder()
         std::this_thread::sleep_for(std::chrono::milliseconds(10));
     }
 
+    if (isStopped_)
+        return;
+
     if (restartSink && !isStopped_) {
         sink_->start();
     }