Fix firelock danger indicators (#12327)

* Fix firelock danger indicators

* remove unused arg

Content.Server/Doors/Components/FirelockComponent.cs

@@ -25,6 +25,14 @@ namespace Content.Server.Doors.Components
         [DataField("pressureThreshold"), ViewVariables(VVAccess.ReadWrite)]
         public float PressureThreshold = 20;
 
+        /// <summary>
+        /// Maximum temperature difference before the firelock will refuse to open, in k.
+        /// </summary>
+        [DataField("temperatureThreshold"), ViewVariables(VVAccess.ReadWrite)]
+        public float TemperatureThreshold = 330;
+        // this used to check for hot-spots, but because accessing that data is a a mess this now just checks
+        // temperature. This does mean a cold room will trigger hot-air pop-ups
+
         /// <summary>
         /// If true, and if this door has an <see cref="AtmosAlarmableComponent"/>, then it will only auto-close if the
         /// alarm is set to danger.