message: Insert markers HostReadWrite() before operator = 1
diff: @@ -45,7 +45,7 @@ void LinearFormExtension::Assemble()
  }
  // if there are no markers, just use the whole linear form (1)
  - if (!has_markers_k) { markers = 1; }
  + if (!has_markers_k) { markers.HostReadWrite(); markers = 1; }
  else
  {
  // scan the attributes to set the markers to 0 or 1
  