From c9853070575fd65d171818777d1a6a06f34d6d3d Mon Sep 17 00:00:00 2001
From: KimLS <KLS@peqtgc.com>
Date: Thu, 31 May 2018 19:24:26 -0700
Subject: [PATCH] Patch detour to avoid a crash if an invalid ref is returned

---
 libs/recast/detour/src/DetourNavMeshQuery.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libs/recast/detour/src/DetourNavMeshQuery.cpp b/libs/recast/detour/src/DetourNavMeshQuery.cpp
index 024d4a1fe..d27a142d0 100644
--- a/libs/recast/detour/src/DetourNavMeshQuery.cpp
+++ b/libs/recast/detour/src/DetourNavMeshQuery.cpp
@@ -1096,7 +1096,9 @@ dtStatus dtNavMeshQuery::findPath(dtPolyRef startRef, dtPolyRef endRef,
 			// The API input has been cheked already, skip checking internal data.
 			const dtMeshTile* neighbourTile = 0;
 			const dtPoly* neighbourPoly = 0;
-			m_nav->getTileAndPolyByRefUnsafe(neighbourRef, &neighbourTile, &neighbourPoly);			
+			if (m_nav->getTileAndPolyByRef(neighbourRef, &neighbourTile, &neighbourPoly) == DT_FAILURE) {
+				continue;
+			}		
 			
 			if (!filter->passFilter(neighbourRef, neighbourTile, neighbourPoly))
 				continue;