Error checking for Stdio calls

runtime/bin/io_natives.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/io_natives.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "bin/builtin.h"
@@ skipping 120 matching lines @@
   V(Socket_GetRemotePeer, 1)                                                   \
   V(Socket_GetError, 1)                                                        \
   V(Socket_GetStdioHandle, 2)                                                  \
   V(Socket_GetType, 1)                                                         \
   V(Socket_GetOption, 3)                                                       \
   V(Socket_SetOption, 4)                                                       \
   V(Socket_JoinMulticast, 4)                                                   \
   V(Socket_LeaveMulticast, 4)                                                  \
   V(Socket_GetSocketId, 1)                                                     \
   V(Socket_SetSocketId, 2)                                                     \
-  V(Stdin_ReadByte, 1)                                                         \
+  V(Stdin_ReadByte, 0)                                                         \
   V(Stdin_GetEchoMode, 0)                                                      \
   V(Stdin_SetEchoMode, 1)                                                      \
   V(Stdin_GetLineMode, 0)                                                      \
   V(Stdin_SetLineMode, 1)                                                      \
   V(Stdout_GetTerminalSize, 1)                                                 \
   V(StringToSystemEncoding, 1)                                                 \
   V(SystemEncodingToString, 1)                                                 \
   V(X509_Subject, 1)                                                           \
   V(X509_Issuer, 1)                                                            \
   V(X509_StartValidity, 1)                                                     \
@@ skipping 35 matching lines @@
     struct NativeEntries* entry = &(IOEntries[i]);
     if (reinterpret_cast<Dart_NativeFunction>(entry->function_) == nf) {
       return reinterpret_cast<const uint8_t*>(entry->name_);
     }
   }
   return NULL;
 }
 
 }  // namespace bin
 }  // namespace dart