From ce54c489ebc32e02f9bdd21835661277a347f422 Mon Sep 17 00:00:00 2001
From: moneyl <8206401+Moneyl@users.noreply.github.com>
Date: Sat, 23 Nov 2019 18:46:48 -0500
Subject: [PATCH] Add null check before using prototype in
 ReagentDispenserWindow (#461)

Should fix #460. I'm unable to reproduce it myself, but the stack trace shows the crash occurring on the edited line, likely because `prop` is null. This fixes that by adding a null check before using `prop`.
---
 .../GameObjects/Components/Chemistry/ReagentDispenserWindow.cs  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Content.Client/GameObjects/Components/Chemistry/ReagentDispenserWindow.cs b/Content.Client/GameObjects/Components/Chemistry/ReagentDispenserWindow.cs
index e276c1b929..60e044d64d 100644
--- a/Content.Client/GameObjects/Components/Chemistry/ReagentDispenserWindow.cs
+++ b/Content.Client/GameObjects/Components/Chemistry/ReagentDispenserWindow.cs
@@ -237,7 +237,7 @@ namespace Content.Client.GameObjects.Components.Chemistry
                 }
 
                 //Check if the reagent is being moused over. If so, color it green.
-                if (proto.ID == highlightedReagentId)
+                if (proto != null && proto.ID == highlightedReagentId)
                 {
                     ContainerInfo.Children.Add(new HBoxContainer
                     {