fix unable to place entrance / exit as a client

src/ride/ride.c

@@ -6013,6 +6013,7 @@ void game_command_callback_ride_construct_placed_back(int eax, int ebx, int ecx,
 		_rideConstructionState = RIDE_CONSTRUCTION_STATE_0;
 	}
 
+	window_ride_construction_do_station_check();
 	sub_6C84CE();
 }
 
@@ -6045,6 +6046,8 @@ void game_command_callback_ride_construct_placed_front(int eax, int ebx, int ecx
 		_rideConstructionState = RIDE_CONSTRUCTION_STATE_0;
 	}
 
+	window_ride_construction_do_station_check();
+	window_ride_construction_do_entrance_exit_check();
 	sub_6C84CE();
 }
 

src/ride/ride.h

@@ -1057,4 +1057,8 @@ const uint32 ride_customers_per_hour(const rct_ride *ride);
 const uint32 ride_customers_in_last_5_minutes(const rct_ride *ride);
 
 rct_vehicle * ride_get_broken_vehicle(rct_ride *ride);
+
+void window_ride_construction_do_station_check();
+void window_ride_construction_do_entrance_exit_check();
+
 #endif

src/windows/ride_construction.c

@@ -1684,7 +1684,7 @@ static void window_ride_construction_construct(rct_window *w)
 		}
 	}
 
-	_stationConstructed = get_ride(w->number)->num_stations != 0;
+	window_ride_construction_do_station_check();
 
 	// returning early here makes it so that the construction window doesn't blink
 	if (network_get_mode() == NETWORK_MODE_CLIENT)
@@ -3948,3 +3948,30 @@ static void ride_construction_tooldown_entrance_exit(int screenX, int screenY)
 			WIDX_ENTRANCE : WIDX_EXIT;
 	}
 }
+
+void window_ride_construction_do_station_check()
+{
+	rct_ride *ride = get_ride(_currentRideIndex);
+	if (ride != NULL) {
+		_stationConstructed = ride->num_stations != 0;
+	}
+}
+
+void window_ride_construction_do_entrance_exit_check()
+{
+	rct_window *w = window_find_by_class(WC_RIDE_CONSTRUCTION);
+	rct_ride *ride = get_ride(_currentRideIndex);
+
+	if (w == NULL || ride == NULL) {
+		return;
+	}
+
+	if (_rideConstructionState == RIDE_CONSTRUCTION_STATE_0) {
+		w = window_find_by_class(WC_RIDE_CONSTRUCTION);
+		if (w != NULL) {
+			if (!ride_are_all_possible_entrances_and_exits_built(ride)) {
+				window_event_mouse_up_call(w, WIDX_ENTRANCE);
+			}
+		}
+	}
+}