Remove mutex names, fixes #722

Named mutexes are used for inter-process synchronization, using them to synchronize threads of a single process is just begging for trouble when running multiple instances of the application.

src/win/win_thread.c

@@ -132,9 +132,9 @@ thread_destroy_event(event_t *arg)
 
 
 mutex_t *
-thread_create_mutex(wchar_t *name)
+thread_create_mutex(void)
 {
-    return((mutex_t*)CreateMutex(NULL, FALSE, name));
+    return((mutex_t*)CreateMutex(NULL, FALSE, NULL));
 }
 
 

src/win/win_ui.c

@@ -962,7 +962,7 @@ ui_init(int nCmdShow)
      * Before we can create the Render window, we first have
      * to prepare some other things that it depends on.
      */
-    ghMutex = CreateMutex(NULL, FALSE, L"86Box.BlitMutex");
+    ghMutex = CreateMutex(NULL, FALSE, NULL);
 
     /* Create the Machine Rendering window. */
     hwndRender = CreateWindow(L"STATIC", NULL, WS_CHILD|SS_BITMAP,