message: Fixed a seg fault when you try to use a CurlCurl integrator without supplying a coeff.
diff: @@ -1460,17 +1460,21 @@ void CurlCurlIntegrator::AssembleElementMatrix
  el.CalcCurlShape(ip, curlshape_dFt);
  }
  - if (Q)
  + if (MQ)
  + {
  + MQ->Eval(M, Trans, ip);
  + M *= w;
  + Mult(curlshape_dFt, M, curlshape);
  + AddMultABt(curlshape, curlshape_dFt, elmat);
  + }
  + else if (Q)
  {
  w *= Q->Eval(Trans, ip);
  AddMult_a_AAt(w, curlshape_dFt, elmat);
  }
  else
  {
  - MQ->Eval(M, Trans, ip);
  - M *= w;
  - Mult(curlshape_dFt, M, curlshape);
  - AddMultABt(curlshape, curlshape_dFt, elmat);
  + AddMult_a_AAt(w, curlshape_dFt, elmat);
  }
  }
  }
  