Better range check for Set Monster Attitude

src/game/boe.specials.cpp

@@ -4147,9 +4147,10 @@ void townmode_spec(const runtime_state& ctx) {
 				else increase_light(-spec.ex2a);
 			}
 			break;
-		case eSpecType::TOWN_SET_ATTITUDE:
-			if((spec.ex1a < 0) || (spec.ex1a > 59)){
-				showError("Tried to change the attitude of a nonexistent monster (should be 0...59).");
+		case eSpecType::TOWN_SET_ATTITUDE:{
+			int num_monst = univ.town.monst.size();
+			if((spec.ex1a < 0) || (spec.ex1a >= num_monst)){
+				showError("Tried to change the attitude of nonexistent monster " + std::to_string(spec.ex1a) + " of 0..." + std::to_string(num_monst));
 				break;
 			}
 			if(spec.ex1b < 0 || spec.ex1b > 3){
@@ -4157,7 +4158,7 @@ void townmode_spec(const runtime_state& ctx) {
 				break;
 			}
 			univ.town.monst[spec.ex1a].attitude = eAttitude(spec.ex1b);
-			break;
+		}break;
 		case eSpecType::TOWN_RUN_MISSILE:
 			if(ctx.which_mode != eSpecCtx::TALK) {
 				int i;

src/universe/population.cpp

@@ -31,6 +31,15 @@ cCreature& cPopulation::operator[](size_t n){
 	return dudes[n];
 }
 
+const cCreature& cPopulation::at(size_t n) const {
+	return dudes.at(n);
+}
+
+cCreature& cPopulation::at(size_t n){
+	return dudes.at(n);
+}
+
+
 void cPopulation::init(size_t n) {
 	if(n >= dudes.size()) dudes.resize(n + 1);
 	dudes[n].active = eCreatureStatus::IDLE;

src/universe/population.hpp

@@ -32,6 +32,8 @@ public:
 	void clear() {dudes.clear();}
 	cCreature& operator[](size_t n);
 	const cCreature& operator[](size_t n) const;
+	cCreature& at(size_t n);
+	const cCreature& at(size_t n) const;
 	cPopulation() : which_town(200), hostile(false) {}
 	std::deque<cCreature>::iterator begin() {return dudes.begin();}
 	std::deque<cCreature>::iterator end() {return dudes.end();}