[Transcode] Close stderr fd in order to avoid potential transcode locks

src/transcode/AvConvTranscoder.cpp

@@ -164,6 +164,7 @@ AvConvTranscoder::AvConvTranscoder(const Parameters& parameters)
 					boost::process::initializers::set_cmd_line(oss.str()),
 					boost::process::initializers::bind_stdout(sink),
 					boost::process::initializers::close_fd(STDIN_FILENO),
+					boost::process::initializers::close_fd(STDERR_FILENO),
 					boost::process::initializers::close_fds(ranges)
 					)
 				);

src/ui/resource/AvConvTranscodeStreamResource.cpp

@@ -47,7 +47,7 @@ AvConvTranscodeStreamResource::handleRequest(const Wt::Http::Request& request,
 	// see if this request is for a continuation:
 	Wt::Http::ResponseContinuation *continuation = request.continuation();
 
-	LMS_LOG(MOD_UI, SEV_DEBUG) << "Handling new request. Continuation = " << std::boolalpha << continuation;
+	LMS_LOG(MOD_UI, SEV_DEBUG) << "Handling new request. Continuation = " << continuation;
 
 	std::shared_ptr<Transcode::AvConvTranscoder> transcoder;
 	if (continuation)