fix initialization test

Author: jClugstor

test/integrators/initialization.jl

@@ -26,13 +26,13 @@ using Test
     prob_ddae = DDEProblem(
         DDEFunction{true}(sir_ddae!;
             mass_matrix = Diagonal([1.0, 1.0, 0.0])),
-        u0,
+        u0_good,
         sir_history,
         tspan,
         p;
         constant_lags = (p.τ,))
     alg = MethodOfSteps(Rosenbrock23())
     @test_nowarn init(prob_ddae, alg)
-    prob.u0[1] = 2.0
+    prob_ddae.u0[1] = 2.0
     @test_throws SciMLBase.CheckInitFailureError init(prob_ddae, alg)
 end