Tidy includes, drop PC STATIC_ASSERTs, and more macro usage

src/d/actor/d_a_bg.cpp

@@ -624,9 +624,7 @@ int daBg_c::create() {
     dComIfGp_roomControl_onStatusFlag(roomNo, 0x10);
     OS_REPORT("<BG> room%d\n", roomNo);
 
-#if TARGET_PC
-    draw_interp_frame = true;
-#endif
+    IF_DUSK(draw_interp_frame = true);
 
     return cPhs_COMPLEATE_e;
 }