AI combat, misc AI improvements, characters can't get stuck inside doors

Subsurface/Source/Sounds/SoundPlayer.cs

@@ -68,11 +68,11 @@ namespace Barotrauma
         private static float currMusicVolume;
 
         private static Sound startDrone;
+
+        public static bool Initialized;
         
         public static IEnumerable<object> Init()
         {
-
-
             startDrone = Sound.Load("Content/Sounds/startDrone.ogg", false);
             startDrone.Play();
 
@@ -148,6 +148,8 @@ namespace Barotrauma
                 }
             }
 
+            Initialized = true;
+
             yield return CoroutineStatus.Success;
 
         }