Remove empty sets in concrete intersection with a set union

[mforets]

The implementation of the concrete intersection stores a vector with the same number of elements as the union's array. However, some of those elements may become empty after intersecting, so it would be preferable to only add non-empty elements (and return the empty set if they are all non-empty).

LazySets.jl/src/ConcreteOperations/intersection.jl

Line 751 in 17a45b9

function intersection(cup::UnionSetArray{N}, X::LazySet{N}) where {N<:Real}

xref: JuliaReach/ReachabilityAnalysis.jl#197

[schillic]

Resolved in #3352.