style: canviar border_ a enum class

source/room.cpp

@@ -645,23 +645,23 @@ void Room::update()
 }
 
 // Devuelve la cadena del fichero de la habitación contigua segun el borde
-std::string Room::getRoom(int border)
+std::string Room::getRoom(RoomBorder border)
 {
     switch (border)
     {
-    case BORDER_TOP:
+    case RoomBorder::TOP:
         return upper_room_;
         break;
 
-    case BORDER_BOTTOM:
+    case RoomBorder::BOTTOM:
         return lower_room_;
         break;
 
-    case BORDER_RIGHT:
+    case RoomBorder::RIGHT:
         return right_room_;
         break;
 
-    case BORDER_LEFT:
+    case RoomBorder::LEFT:
         return left_room_;
         break;