Fix use-after-free in creature conditions (#4726)

Author: diath

src/creature.cpp

@@ -33,6 +33,9 @@ Creature::~Creature()
 
 	for (Condition* condition : conditions) {
 		condition->endCondition(this);
+	}
+
+	for (auto condition : conditions) {
 		delete condition;
 	}
 }