From 07f6dee616cda17e020b32a2f0b8caca76aa621d Mon Sep 17 00:00:00 2001
From: Cameron Mulhern <cameron@liveapp.com>
Date: Fri, 15 Jan 2016 16:14:53 -0500
Subject: [PATCH] [ios] Fixes crash when vendorId is nil

---
 platform/ios/src/MGLMapboxEvents.m | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/platform/ios/src/MGLMapboxEvents.m b/platform/ios/src/MGLMapboxEvents.m
index 8490c0319..bde735f22 100644
--- a/platform/ios/src/MGLMapboxEvents.m
+++ b/platform/ios/src/MGLMapboxEvents.m
@@ -402,6 +402,9 @@ const NSTimeInterval MGLFlushInterval = 60;
 
             // Build only IDFV event
             NSString *vid = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
+
+            if (!vid) return;
+
             NSDictionary *vevt = @{
                 @"event" : MGLEventTypeAppUserTurnstile,
                 @"created" : [strongSelf.rfc3339DateFormatter stringFromDate:[NSDate date]],