Air alarm patches (#11004)

Content.Shared/Atmos/Monitor/AtmosAlarmType.cs

@@ -5,8 +5,9 @@ namespace Content.Shared.Atmos.Monitor;
 [Serializable, NetSerializable]
 public enum AtmosAlarmType : sbyte
 {
-    Normal = 0,
-    Warning = 1,
-    Danger = 2, // 1 << 1 is the exact same thing and we're not really doing **bitmasking** are we?
-    Emagged = 3,
+    Invalid = 0,
+    Normal = 1,
+    Warning = 2,
+    Danger = 3,
+    Emagged = 4,
 }