Dense array type for `SparseMatrixCSC` should be `Matrix`?

[gdalle]

GPUArrays.jl/src/host/sparse.jl

Lines 56 to 57 in 8d569fc

	dense_array_type(sa::SparseMatrixCSC) = SparseMatrixCSC
	dense_array_type(::Type{SparseMatrixCSC}) = SparseMatrixCSC

[kshyatt]

Oh the reason for this is that base's sparse broadcasting does something really weird. SparseMatrixCSC .+ Matrix will return a SparseMatrixCSC.