Pass Type to luax_register_type by pointer instead of reference

Since the type is passed to va_start, and apparently that's undefined behaviour if it's a reference.

<Textmode> the best kind of behavior

--HG--
branch : dynamiccore2

src/modules/sound/wrap_Decoder.cpp

@@ -109,7 +109,7 @@ static const luaL_Reg w_Decoder_functions[] =
 
 extern "C" int luaopen_decoder(lua_State *L)
 {
-	return luax_register_type(L, Decoder::type, w_Decoder_functions, nullptr);
+	return luax_register_type(L, &Decoder::type, w_Decoder_functions, nullptr);
 }
 
 } // sound

src/modules/sound/wrap_SoundData.cpp

@@ -110,7 +110,7 @@ static const luaL_Reg w_SoundData_functions[] =
 
 extern "C" int luaopen_sounddata(lua_State *L)
 {
-	int ret = luax_register_type(L, SoundData::type, w_Data_functions, w_SoundData_functions, nullptr);
+	int ret = luax_register_type(L, &SoundData::type, w_Data_functions, w_SoundData_functions, nullptr);
 
 	luax_gettypemetatable(L, SoundData::type);