fix more depwarns

Author: ChrisRackauckas

REQUIRE

@@ -1,4 +1,4 @@
-julia 0.7-beta
+julia 0.7-beta2
 ParameterizedFunctions 2.0.0
 DiffEqBase 3.0.3
 DiffEqOperators

src/jump_premade_problems.jl

@@ -175,7 +175,7 @@ genenetwork = construct_genenetwork(N)
 rs = eval( Meta.parse(genenetwork) )
 u0 = zeros(Int, length(rs.syms))
 for i = 1:(2*N)
-    u0[findfirst(rs.syms, Symbol("G$(i)"))] = 1
+    u0[something(findfirst(isequal(Symbol("G$(i)")),rs.syms),0)] = 1
 end
 tf = 2000.0
 prob = DiscreteProblem(u0, (0.0, tf))