From fc67252e7809928dd634eee016498ee25f16ca05 Mon Sep 17 00:00:00 2001
From: hiker <henrichsjoerg@gmail.com>
Date: Fri, 25 Sep 2015 09:15:47 +1000
Subject: [PATCH] Fix #2300 (mostly,karts get stuck there atm, but can't drive
 through the door).

---
 src/physics/physical_object.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/physics/physical_object.cpp b/src/physics/physical_object.cpp
index 765e6c322..9158fbd64 100644
--- a/src/physics/physical_object.cpp
+++ b/src/physics/physical_object.cpp
@@ -496,6 +496,11 @@ void PhysicalObject::init()
     btVector3 inertia(1,1,1);
     if (m_body_type != MP_EXACT)
         m_shape->calculateLocalInertia(m_mass, inertia);
+    else
+    {
+        if (m_mass == 0)
+            inertia.setValue(0, 0, 0);
+    }
     btRigidBody::btRigidBodyConstructionInfo info(m_mass, m_motion_state,
                                                   m_shape, inertia);