hermitianpart(A) converts SMatrix to Matrix

[stevengj]

julia> A = SA[1 2; 3 4]
2×2 SMatrix{2, 2, Int64, 4} with indices SOneTo(2)×SOneTo(2):
 1  2
 3  4

julia> hermitianpart(A)
2×2 Hermitian{Float64, Matrix{Float64}}:
 1.0  2.5
 2.5  4.0

The problem is that the LinearAlgebra implementation calls copy_similar.