disable CSE warnings since we are okay with not CSEing if CommonSubexpressions does not support the expression

Author: jrevels

REQUIRE

@@ -5,4 +5,4 @@ DiffResults 0.0.1
 DiffRules 0.0.4
 NaNMath 0.2.2
 SpecialFunctions 0.1.0
-CommonSubexpressions 0.0.1
+CommonSubexpressions 0.1.0

src/prelude.jl

@@ -57,7 +57,7 @@ function qualified_cse!(expr)
         placeholders[placeholder] = x
         placeholder
     end
-    cse_expr = CommonSubexpressions.cse(expr)
+    cse_expr = CommonSubexpressions.cse(expr, false)
     replace_match!(x -> haskey(placeholders, x), cse_expr.args) do x
         placeholders[x]
     end