Switch return type of _execute/_draw/_delete to be bool by default instead of BOOL

It's not completely consistent, but it seems like the majority used `bool`, and only a handful used `BOOL`. So I switched all of them to `bool` except for 13 TUs that stopped matching when changed like this.

src/d/actor/d_a_obj_vtil.cpp

@@ -22,7 +22,7 @@ s32 daObjVtil_c::_create() {
 }
 
 /* 000006CC-00000718       .text _delete__11daObjVtil_cFv */
-BOOL daObjVtil_c::_delete() {
+bool daObjVtil_c::_delete() {
     /* Nonmatching */
 }
 
@@ -162,12 +162,12 @@ void daObjVtil_c::check_circle() {
 }
 
 /* 00001634-000017CC       .text _execute__11daObjVtil_cFv */
-BOOL daObjVtil_c::_execute() {
+bool daObjVtil_c::_execute() {
     /* Nonmatching */
 }
 
 /* 000017CC-00001864       .text _draw__11daObjVtil_cFv */
-BOOL daObjVtil_c::_draw() {
+bool daObjVtil_c::_draw() {
     /* Nonmatching */
 }