From a5bb8bc2815f1b293799ca99701f5a7f4ca9993d Mon Sep 17 00:00:00 2001
From: Jerrad Thramer <jerrad.thramer@mapbox.com>
Date: Thu, 9 Nov 2017 15:43:42 -0700
Subject: [PATCH] Fixing issue where a missing (or invalid) value for
 `distanceMeasurementSystem` keypath would cause initializer to fail entirely.

---
 MapboxDirections/MBRouteOptions.swift | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/MapboxDirections/MBRouteOptions.swift b/MapboxDirections/MBRouteOptions.swift
index 631cdde7b..fa474acb4 100644
--- a/MapboxDirections/MBRouteOptions.swift
+++ b/MapboxDirections/MBRouteOptions.swift
@@ -231,10 +231,9 @@ open class RouteOptions: NSObject, NSSecureCoding, NSCopying{
 
         includesSpokenInstructions = decoder.decodeBool(forKey: "includesSpokenInstructions")
         
-        guard let distanceMeasurementSystem = MeasurementSystem(description: decoder.decodeObject(of: NSString.self, forKey: "distanceMeasurementSystem") as String? ?? "") else {
-            return nil
+        if let distanceMeasurementSystem = MeasurementSystem(description: decoder.decodeObject(of: NSString.self, forKey: "distanceMeasurementSystem") as String? ?? "") {
+            self.distanceMeasurementSystem = distanceMeasurementSystem
         }
-        self.distanceMeasurementSystem = distanceMeasurementSystem
     }
 
     open static var supportsSecureCoding = true