Use the right type for values

Summary: MSVC was complaining very loudly about these being implicitly truncated to `int`s in the initialization of OptionsMap, so declare them as `int`.

Reviewed By: yfeldblum

Differential Revision: D10861911

fbshipit-source-id: 0d5c52fe4b5e59c5e101546093a13849fe3b2a7a

folly/io/async/test/AsyncSocketTest2.cpp

@@ -1156,8 +1156,8 @@ TEST(AsyncSocketTest, WriteErrorCallbackBytesWritten) {
   TestServer server(false, kSockBufSize);
 
   AsyncSocket::OptionMap options{
-      {{SOL_SOCKET, SO_SNDBUF}, kSockBufSize},
-      {{SOL_SOCKET, SO_RCVBUF}, kSockBufSize},
+      {{SOL_SOCKET, SO_SNDBUF}, int(kSockBufSize)},
+      {{SOL_SOCKET, SO_RCVBUF}, int(kSockBufSize)},
       {{IPPROTO_TCP, TCP_NODELAY}, 1},
   };