Update lib/OrdinaryDiffEqDifferentiation/src/derivative_utils.jl

Co-authored-by: Guillaume Dalle <22795598+gdalle@users.noreply.github.com>

Author: ChrisRackauckas

lib/OrdinaryDiffEqDifferentiation/src/derivative_utils.jl

@@ -180,9 +180,9 @@ function calc_J!(J, integrator, cache, next_step::Bool = false)
             if !isnothing(integrator.f.jac_prototype) && 
                 integrator.f.jac_prototype isa SparseMatrixCSC
 
-                integrator.f.jac_prototype.nzval .= 1.0
-                J .= 1.0 .* integrator.f.jac_prototype
-                J.nzval .= 0.0
+                integrator.f.jac_prototype.nzval .= true
+                J .= true .* integrator.f.jac_prototype
+                J.nzval .= false
                 f.jac(J, duprev, uprev, p, uf.α * uf.invγdt, t)
             else
                 f.jac(J, duprev, uprev, p, uf.α * uf.invγdt, t)