Now sound init param removal revert should be fine (apparently my cmake project files missed rebuild hint for these, fortunately SCons did its job well).

source/blender/windowmanager/intern/wm_files.c

@@ -254,7 +254,7 @@ static void wm_init_userdef(bContext *C)
 
 	UI_init_userdef();
 	MEM_CacheLimiter_set_maximum(U.memcachelimit * 1024 * 1024);
-	sound_init();
+	sound_init(CTX_data_main(C));
 
 	/* set the python auto-execute setting from user prefs */
 	/* disabled by default, unless explicitly enabled in the command line */

source/gameengine/GamePlayer/ghost/GPG_Application.cpp

@@ -583,7 +583,7 @@ bool GPG_Application::initEngine(GHOST_IWindow* window, const int stereoMode)
 		if (!m_networkdevice)
 			goto initFailed;
 			
-		sound_init();
+		sound_init(m_maggie);
 
 		// create a ketsjisystem (only needed for timing and stuff)
 		m_kxsystem = new GPG_System (m_system);