Crash when colliding a .dif object

Point3F TSStaticConvex::support(const VectorF& v) const
{
   TSShape::ConvexHullAccelerator* pAccel =
      pStatic->mShapeInstance->getShape()->getAccelerator(pStatic->mCollisionDetails[hullId]);
   AssertFatal(pAccel != NULL, "Error, no accel!");

   F32 currMaxDP = mDot(pAccel->vertexList[0], v);
                   ^^^^^^ -> crash as vertexList = NULL

   U32 index = 0;
   for (U32 i = 1; i < pAccel->numVerts; i++) {
      F32 dp = mDot(pAccel->vertexList[i], v);
      if (dp > currMaxDP) {
         currMaxDP = dp;
         index = i;
      }
   }

   return pAccel->vertexList[index];
}