std::aligned_storage<>::type is not a dependent type

Summary: Which causes MSVC to get grumpy when you tell it that it is.

Reviewed By: yfeldblum

Differential Revision: D3479016

fbshipit-source-id: e674b210aaa5a644c5ed884a7077a5cf33b05196

folly/Function.h

@@ -242,7 +242,7 @@ enum class Op { MOVE, NUKE, FULL, HEAP };
 
 union Data {
   void* big;
-  typename std::aligned_storage<6 * sizeof(void*)>::type small;
+  std::aligned_storage<6 * sizeof(void*)>::type small;
 };
 
 template <typename Fun, typename FunT = typename std::decay<Fun>::type>