Only limbs with enough mass can cause impact damage to the sub, basictutorial changes, prevent ragdolls from teleporting inside submarinebody

Subsurface/Source/Map/Md5Hash.cs

@@ -50,6 +50,8 @@ namespace Barotrauma
 
         public Md5Hash(XDocument doc)
         {
+            if (doc == null) return;
+
             string docString = Regex.Replace(doc.ToString(), @"\s+", "");
 
             byte[] inputBytes = Encoding.ASCII.GetBytes(docString);

Subsurface/Source/Map/SubmarineBody.cs

@@ -349,13 +349,13 @@ namespace Barotrauma
                 {
                     bool collision = HandleLimbCollision(contact, limb);
 
-                    if (collision)
+                    if (collision && limb.Mass>100.0f)
                     {
                         Vector2 normal = Vector2.Normalize(body.Position - limb.SimPosition);
 
                         //normal *= Math.Min(limb.Mass,100)/100.0f;
 
-                        float impact = Math.Min(Vector2.Dot(Velocity - limb.LinearVelocity, -normal),5.0f);
+                        float impact = Math.Min(Vector2.Dot(Velocity - limb.LinearVelocity, -normal), 5.0f);
 
                         ApplyImpact(impact * Math.Min(limb.Mass/200.0f, 1), -normal, contact);