Fix pulling not stopping when going into a container (#1712)

Content.Shared/Physics/Pull/PullStartedMessage.cs

@@ -0,0 +1,12 @@
+using Robust.Shared.GameObjects.Components;
+
+namespace Content.Shared.Physics.Pull
+{
+    public class PullStartedMessage : PullMessage
+    {
+        public PullStartedMessage(PullController controller, ICollidableComponent puller, ICollidableComponent pulled) :
+            base(controller, puller, pulled)
+        {
+        }
+    }
+}