[lla] Make sure session is stopped on last release

Author: kostorr

include/Alf/Lla.h

@@ -32,6 +32,7 @@ class LlaSession
  public:
   LlaSession(std::shared_ptr<lla::Session> llaSession);
   LlaSession(std::string sessionName, roc::SerialId serialId);
+  ~LlaSession();
   void start();
   void stop();
 

src/Lla.cxx

@@ -33,6 +33,14 @@ LlaSession::LlaSession(std::string sessionName, roc::SerialId serialId)
 {
 }
 
+/* The LlaSession object goes out of scope when the last shared_ptr instance is destroyed (See AlfServer.h).
+   Since said destruction may follow an erroneous event and the session might not be explicitly stopped
+   it is forcefully stopped it in the destructor */
+LlaSession::~LlaSession()
+{
+  stop();
+}
+
 void LlaSession::start()
 {
   if (!mSession) {