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_e_zm.cpp

@@ -949,12 +949,10 @@ cPhs__Step daE_ZM_c::create() {
             attention_info.distances[fopAc_attn_BATTLE_e] = 0;
             fopAcM_SetGroup(this, 0);
 
-            #ifdef DEBUG
             if (NREG_S(0) != 0) {
                 fopAcM_SetMin(this, -20000.0f, -10000.0f, -10000.0f);
                 fopAcM_SetMax(this, 20000.0f, 10000.0f, 10000.0f);
             }
-            #endif
 
             bitSw = 0xFF;
             bitSw2 = 0xFF;