Fix hardestroom not being translated

`hardestroom` currently stores the current roomname, but it was missing
a call to get the translated string. This has been added, fixing the
hardest room appearing as untranslated.

desktop_version/src/Game.cpp

@@ -4189,7 +4189,7 @@ void Game::gethardestroom(void)
         }
         else
         {
-            hardestroom = map.roomname;
+            hardestroom = loc::gettext_roomname(map.custommode, roomx, roomy, map.roomname, map.roomname_special);
         }
     }
 }