(83ad1f3d2) Fix a null reference exception.

Barotrauma/BarotraumaShared/Source/Map/Hull.cs

@@ -15,12 +15,6 @@ namespace Barotrauma
         public static List<Hull> hullList = new List<Hull>();
         public static List<EntityGrid> EntityGrids { get; } = new List<EntityGrid>();
 
-        public string DisplayName
-        {
-            get;
-            private set;
-        }
-
         public static bool EditWater, EditFire;
         public const float OxygenDistributionSpeed = 500.0f;
         public const float OxygenDeteriorationSpeed = 0.3f;
@@ -174,6 +168,25 @@ namespace Barotrauma
             }
         }
 
+        public string DisplayName
+        {
+            get;
+            private set;
+        }
+
+        private string roomName;
+        [Editable, Serialize("", true, translationTextTag: "RoomName.")]
+        public string RoomName
+        {
+            get { return roomName; }
+            set
+            {
+                if (roomName == value) { return; }
+                roomName = value;
+                DisplayName = TextManager.Get(roomName, returnNull: true) ?? roomName;
+            }
+        }
+
         public override Rectangle Rect
         {
             get