From 794474afab76fed798f63103c7c52e3cad2ce2f9 Mon Sep 17 00:00:00 2001
From: Isaac Connor <isaac@zoneminder.com>
Date: Wed, 2 Sep 2020 17:22:00 -0400
Subject: [PATCH] Add UNKNOWN status type. test for shared_data in ShmValid()

---
 src/zm_monitor.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/zm_monitor.h b/src/zm_monitor.h
index 345a85862..e020ba391 100644
--- a/src/zm_monitor.h
+++ b/src/zm_monitor.h
@@ -88,6 +88,7 @@ public:
   } Orientation;
 
   typedef enum {
+    UNKNOWN,
     IDLE,
     PREALARM,
     ALARM,
@@ -425,7 +426,7 @@ public:
   bool connect();
 
   inline int ShmValid() const {
-    return shared_data->valid;
+    return shared_data && shared_data->valid;
   }
 
   inline unsigned int Id() const {