removed all C-style casts

src/enemies/dragon.cc

@@ -6,10 +6,6 @@ dragon::dragon(RNG *rng, const feature enabled_features, const position &pos,
                const int gen_room_num):
         enemy_base{rng, enabled_features, rdragon, pos, gen_room_num, "D"} {}
 
-void dragon::print(output *out) {
-        out->print_char(pos, 'D', COLOR_PAIR(COLOR_RED));
-}
-
 const char *dragon::get_race_name() const {
         return "Dragon";
 }
@@ -20,3 +16,7 @@ long_result dragon::act(level *lvl, character *pc, bool hostile) {
 
         return {fine, ""};
 }
+
+int dragon::dies(level *lvl) {
+        return 0;
+}