Various debug conditional compilation cleanup (#2915)

* Global: Define DEBUG as 0 if not already defined

* Clean up DEBUG-guarded code

src/d/actor/d_a_npc_raca.cpp

@@ -311,10 +311,10 @@ int daNpc_Raca_c::Draw() {
     }
 
     draw(
-#ifdef DEBUG
+#if DEBUG
         chkAction(mAction),
 #else
-        0,
+        FALSE,
 #endif
         FALSE, mRealShadowSize, NULL, 100.0f, FALSE, FALSE, FALSE
     );