Fixed 'unused variable' warninings when compiling without thread safety

include/cantera/base/ct_thread.h

@@ -40,9 +40,14 @@ typedef boost::mutex mutex_t;
 typedef boost::mutex::scoped_lock ScopedLock;
 
 #else
-
 typedef int mutex_t;
-typedef int ScopedLock;
+
+class ScopedLock {
+public:
+    explicit ScopedLock(const int m) : m_(m) {}
+private:
+    int m_;
+};
 
 #endif // THREAD_SAFE_CANTERA
 

src/base/application.cpp

@@ -35,14 +35,12 @@ cthreadId_t getThisThreadId()
     return pthread_self();
 #endif
 }
+
 #endif
 
 //! Mutex for input directory access
 static mutex_t dir_mutex;
 
-//! Mutex for access to string messages
-static mutex_t msg_mutex;
-
 //! Mutex for creating singletons within the application object
 static mutex_t app_mutex;
 
@@ -304,6 +302,10 @@ void Application::Messages::write_logfile(std::string file)
 #endif // WITH_HTML_LOGS
 
 #ifdef THREAD_SAFE_CANTERA
+
+//! Mutex for access to string messages
+static mutex_t msg_mutex;
+
 Application::Messages* Application::ThreadMessages::operator ->()
 {
     ScopedLock msgLock(msg_mutex);