Update ext/DiffEqBaseEnzymeExt.jl

Author: ChrisRackauckas

ext/DiffEqBaseEnzymeExt.jl

@@ -7,7 +7,7 @@ isdefined(Base, :get_extension) ? (import Enzyme) : (import ..Enzyme)
 using ChainRulesCore
 using EnzymeCore
 
-function EnzymeCore.EnzymeRules.augmented_primal(config::EnzymeCore.EnzymeRules.ConfigWidth{1}, func::Const{typeof(DiffEqBase.solve_up)}, ::Type{Duplicated{RT}}, prob, sensealg, u0, p, args...; kwargs...) where RT
+function EnzymeCore.EnzymeRules.augmented_primal(config::EnzymeCore.EnzymeRules.ConfigWidth{1}, func::Const{typeof(DiffEqBase.solve_up)}, ::Type{Duplicated{RT}}, prob, sensealg::Union{Const{Nothing}, Const{<:AbstractSensitivityAlgorithm}}, u0, p, args...; kwargs...) where RT
     @inline function copy_or_reuse(val, idx)
         if EnzymeCore.EnzymeRules.overwritten(config)[idx] && ismutable(val)
             return deepcopy(val)