d_a_obj_gra2 work (#2482)

* Tiny start on d_a_obj_gra2

* Initial work

* Solid work done

* More work

* work on some rolling functions and deme camera

* Almost all functions worked on

* All functions worked on

* Fixed some BaseNpc functions I broke

* PR Cleanup

* PR cleanup part 2

include/d/d_msg_object.h

@@ -544,6 +544,10 @@ inline s16 dMsgObject_getSelectBombPrice() {
     dMsgObject_getMsgObjectClass()->getSelectBombPrice();
 }
 
+inline bool dMsgObject_isMouthCheck() {
+    return dMsgObject_getMsgObjectClass()->isMouthCheck();
+}
+
 class dMsgObject_HowlHIO_c {
 public:
     /* 80232AEC */ dMsgObject_HowlHIO_c();