Merged dMesg_tControl classes (#670)

* Merged dMesg_tControl class definitions

* Fix build

* Fix

* Fixed error

src/d/d_demo.cpp

@@ -6,6 +6,7 @@
 #include "d/d_demo.h"
 #include "f_op/f_op_camera_mng.h"
 #include "d/d_com_inf_game.h"
+#include "d/d_mesg.h"
 #include "m_Do/m_Do_printf.h"
 
 /* 800692C4-80069330       .text __ct__13dDemo_actor_cFv */

src/d/d_mesg.cpp

@@ -43,7 +43,7 @@ dMesg_tControl::dMesg_tControl() {
 }
 
 /* 801E0274-801E0288       .text do_word__14dMesg_tControlFUl */
-void dMesg_tControl::do_word(u32) {
+const char* dMesg_tControl::do_word(u32) {
     /* Nonmatching */
 }