message: A better way to make an uninitialized dict.
diff: @@ -28,8 +28,9 @@ struct A<T> {
  }
  mutating func a() -> T? {
  - var adict : [String: Any] = ["key1" : "val1", "key2" : 9999] //% self.expect("frame var adict", "Frame var of uninitialized variable returns.")
  - adict["key3"] = 1.0
  + var adict : [String: Any] //% self.expect("frame variable adict", "Frame variable of an uninitialized dict returns")
  + adict = [String: Any]()
  + adict["key1"] = 1.0
  var t : T? = nil
  let c = cs[0]
  