zerocorr + inflationfactor => crash / not defined for strided matrices

[behinger]

There will be more bugreports coming, but so I dont forget

zerocorr + inflationfactor => crash / not defined for strided matrices

cov(λmle):3×3 LinearAlgebra.Diagonal{Float64, Vector{Float64}}:
 1.40284    ⋅       ⋅ 
  ⋅       14.1031   ⋅ 
  ⋅         ⋅      0.00451851
cov(λemp):3×3 Matrix{Float64}:
 14.0876      1.16592      0.0133924
  1.16592     1.38775     -0.00259049
  0.0133924  -0.00259049   0.00103344

in inflationfactor we do: mle / emp => results in following error

MethodError: no method matching rdiv!(::SparseArrays.SparseMatrixCSC{Float64, Int64}, ::LinearAlgebra.LowerTriangular{Float64, Matrix{Float64}})

Closest candidates are:

rdiv!(!Matched::StridedMatrix{T}, ::LinearAlgebra.LowerTriangular{T, <:StridedMatrix{T} where T}) where T<:Union{Float32, Float64, ComplexF32, ComplexF64} at /opt/julia-1.7.2/share/julia/stdlib/v1.7/LinearAlgebra/src/triangular.jl:731

rdiv!(!Matched::StridedMatrix{T} where T, ::LinearAlgebra.LowerTriangular) at /opt/julia-1.7.2/share/julia/stdlib/v1.7/LinearAlgebra/src/triangular.jl:1361

rdiv!(!Matched::ChainRulesCore.AbstractThunk, ::Any) at ~/.julia/packages/ChainRulesCore/sHMAp/src/tangent_types/thunks.jl:86

...

    /(::LinearAlgebra.Diagonal{Float64, Vector{Float64}}, ::LinearAlgebra.LowerTriangular{Float64, Matrix{Float64}})@triangular.jl:1677
    (::Main.workspace#31.var"#1#2"{Float64})(::Tuple{MixedModels.ReMat{Float64, 3}, Matrix{Float64}})@[Local: 38](http://localhost:1234/edit?id=13a303e0-b69d-11ec-289a-a56f888854a6#)
    iterate@generator.jl:47[inlined]
    collect(::Base.Generator{Base.Iterators.Zip{Tuple{Vector{MixedModels.AbstractReMat{Float64}}, Vector{Matrix{Float64}}}}, Main.workspace#31.var"#1#2"{Float64}})@array.jl:724
    map(::Function, ::Base.Iterators.Zip{Tuple{Vector{MixedModels.AbstractReMat{Float64}}, Vector{Matrix{Float64}}}})@abstractarray.jl:2878
    top-level scope@[Local: 5](http://localhost:1234/edit?id=13a303e0-b69d-11ec-289a-a56f888854a6#)