avoid casting in transform (#232)

* avoid casting in transform

* version bump to v0.7.21

Author: jishnub

Project.toml

@@ -1,6 +1,6 @@
 name = "ApproxFunBase"
 uuid = "fbd15aa5-315a-5a7d-a8a4-24992e37be05"
-version = "0.7.20"
+version = "0.7.21"
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"

src/Multivariate/TensorSpace.jl

@@ -403,7 +403,7 @@ for (plan, plan!, Typ) in ((:plan_transform, :plan_transform!, :TransformPlan),
 
         function *(T::$Typ{TT,SS,false},v::AbstractVector) where {SS<:TensorSpace,TT}
             P = $Typ(T.space,T.plan,Val{true})
-            P*AbstractVector{rangetype(SS)}(v)
+            P * copy(v)
         end
     end
 end