small change

src/backend/core/mmio/PI.cpp

@@ -52,8 +52,7 @@ FORCE_INLINE u8 PIGetDomain(u32 address) {
     case CART_REGION_2_2:
       return 2;
     default:
-      //Util::panic("Unknown PI domain for address {:08X}!", address);
-      return 1;
+      Util::panic("Unknown PI domain for address {:08X}!", address);
   }
 }