JET: MethodError for zero polynomial

[fkastner]

Complaint from JET.jl:

┌ roots(poly::Vector{Int64}) @ PolynomialRoots /src/PolynomialRoots.jl:610
│┌ roots(poly::Vector{Int64}; epsilon::Float64, polish::Bool) @ PolynomialRoots /src/PolynomialRoots.jl:617
││ no matching method found `(::Colon)(::Int64, ::Nothing)` (1/2 union split): (1 PolynomialRoots.:(:) last_nz::Union{Nothing, Int64})
│└────────────────────

So Line 617 errors with a MethodError for ::Colon if the input vector has no nonzero element.

MWE:

using PolynomialRoots
roots([0,0,0])