Minor code cleanup

src/modules/thread/sdl/threads.cpp

@@ -27,6 +27,7 @@ namespace thread
 {
 namespace sdl
 {
+
 Mutex::Mutex()
 {
 	mutex = SDL_CreateMutex();
@@ -81,6 +82,11 @@ bool Conditional::wait(thread::Mutex *_mutex, int timeout)
 
 } // sdl
 
+
+/**
+ * Implementations of the functions declared in src/modules/threads.h.
+ **/
+
 thread::Mutex *newMutex()
 {
 	return new sdl::Mutex();