From 1dd5d3a3f5bb2015d1353f7a8d4d348f2d099401 Mon Sep 17 00:00:00 2001
From: ZehMatt <m.moninger.h@gmail.com>
Date: Sat, 30 Sep 2017 22:07:24 +0200
Subject: [PATCH] Verify there is an empty slot for a new ride

---
 src/openrct2/actions/RideCreateAction.hpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/openrct2/actions/RideCreateAction.hpp b/src/openrct2/actions/RideCreateAction.hpp
index a5d8b3032d..7aeabd7727 100644
--- a/src/openrct2/actions/RideCreateAction.hpp
+++ b/src/openrct2/actions/RideCreateAction.hpp
@@ -73,6 +73,13 @@ public:
 
     GameActionResult::Ptr Query() const override
     {
+        sint32 rideIndex = ride_get_empty_slot();
+        if (rideIndex == -1)
+        {
+            // No more free slots available.
+            return std::make_unique<RideCreateGameActionResult>(GA_ERROR::NO_FREE_ELEMENTS, STR_NONE);
+        }
+
         if (_rideType >= RIDE_TYPE_COUNT)
         {
             return std::make_unique<RideCreateGameActionResult>(GA_ERROR::INVALID_PARAMETERS, STR_INVALID_RIDE_TYPE);