This is still a hack, but a less dangerous one. The old code had a problem
if it was called from different threads, or if for some reason it would get
called recursively.
updateData();
// Hack. Any inset with a cell would do.
- static InsetMathSqrt inset(0);
- inset.setBuffer(const_cast<Buffer &>(*buffer_));
+ InsetMathSqrt inset(const_cast<Buffer *>(buffer_));
docstring const & definition(display_.empty() ? definition_ : display_);
asArray(definition, inset.cell(0));