Astar gizmo patch

diff --git a/Assets/Code/AstarPathfindingProject/Core/astarclasses.cs b/Assets/Code/AstarPathfindingProject/Core/astarclasses.cs
index 18592b1a..df9eb03c 100644
--- a/Assets/Code/AstarPathfindingProject/Core/astarclasses.cs
+++ b/Assets/Code/AstarPathfindingProject/Core/astarclasses.cs
@@ -32,6 +32,7 @@ namespace Pathfinding {
 		/// </summary>
 		public Color[] _AreaColors;

+        private static int? _hashTemp = null;
 		public static Color SolidColor = new Color(30/255f, 102/255f, 201/255f, 0.9F);
 		public static Color UnwalkableNode = new Color(1, 0, 0, 0.5F);
 		public static Color BoundsHandles = new Color(0.29F, 0.454F, 0.741F, 0.9F);
@@ -44,10 +45,17 @@ namespace Pathfinding {
 		private static Color[] AreaColors = new Color[1];

 		public static int ColorHash () {
+            if (_hashTemp != null)
+            {
+                return _hashTemp.Value;
+            }
 			var hash = SolidColor.GetHashCode() ^ UnwalkableNode.GetHashCode() ^ BoundsHandles.GetHashCode() ^ ConnectionLowLerp.GetHashCode() ^ ConnectionHighLerp.GetHashCode() ^ MeshEdgeColor.GetHashCode();

 			for (int i = 0; i < AreaColors.Length; i++) hash = 7*hash ^ AreaColors[i].GetHashCode();
-			return hash;
+
+            _hashTemp = hash;
+
+            return hash;
 		}

 		/// <summary>
@@ -86,7 +94,9 @@ namespace Pathfinding {
 			ConnectionHighLerp = _ConnectionHighLerp;
 			MeshEdgeColor = _MeshEdgeColor;
 			AreaColors = _AreaColors;
-		}
+
+            _hashTemp = null;
+        }

 		public AstarColor () {
 			// Set default colors
diff --git a/Assets/Code/AstarPathfindingProject/Generators/NavmeshBase.cs b/Assets/Code/AstarPathfindingProject/Generators/NavmeshBase.cs
index e4cf9a4e..f9f52ebd 100644
--- a/Assets/Code/AstarPathfindingProject/Generators/NavmeshBase.cs
+++ b/Assets/Code/AstarPathfindingProject/Generators/NavmeshBase.cs
@@ -1312,10 +1312,17 @@ namespace Pathfinding {
 				// Update navmesh vizualizations for
 				// the tiles that have been changed
 				for (int i = 0; i < tiles.Length; i++) {
-					// This may happen if an exception has been thrown when the graph was scanned.
-					// We don't want the gizmo code to start to throw exceptions as well then as
-					// that would obscure the actual source of the error.
-					if (tiles[i] == null) continue;
+                    Vector3 worldSpace = tiles[i].transform.InverseTransform(new Vector3(tiles[i].bbTree.Size.center.x, 0, tiles[i].bbTree.Size.center.y));
+                    Vector3 screenSpace = Camera.current.WorldToScreenPoint(worldSpace);
+                    if (screenSpace.x < 0
+                        || screenSpace.y < 0
+                        || screenSpace.x > Screen.width
+                        || screenSpace.y > Screen.height) continue;

 					// Calculate a hash of the tile
 					var hasher = new RetainedGizmos.Hasher(active);