Change the signature of the selector parameter in AsyncBuilder.Bind for non-generic Task so that a result can be returned.

Author: panesofglass

src/FSharpx.Core/Async.fs

@@ -60,7 +60,7 @@ module AsyncExtensions =
     /// 'Bind' of the 'async' builder. The new overload awaits on 
     /// a standard .NET task
     type Microsoft.FSharp.Control.AsyncBuilder with
-        member x.Bind(t:Tasks.Task<'T>, f:'T -> Async<'R>) : Async<'R>   = async.Bind(Async.AwaitTask t, f)
-        member x.Bind(t:Tasks.Task, f:unit -> Async<unit>) : Async<unit> = async.Bind(Async.AwaitTask t, f)
+        member x.Bind(t:Tasks.Task<'T>, f:'T -> Async<'R>) : Async<'R> = async.Bind(Async.AwaitTask t, f)
+        member x.Bind(t:Tasks.Task, f:unit -> Async<'R>)   : Async<'R> = async.Bind(Async.AwaitTask t, f)
 
 #endif