Add size_t for windows

Author: mehrdadh

src/runtime/rpc/rpc_channel_logger.h

@@ -30,6 +30,11 @@
 #include "../minrpc/minrpc_server_logging.h"
 #include "rpc_channel.h"
 
+#if defined(_MSC_VER)
+#include <BaseTsd.h>
+typedef SSIZE_T ssize_t;
+#endif
+
 #define RX_BUFFER_SIZE 65536
 
 namespace tvm {