[NaCl SDK] nacl_io: add return value to nacl_io_init.

native_client_sdk/src/libraries/nacl_io/nacl_io.cc

Index: native_client_sdk/src/libraries/nacl_io/nacl_io.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/nacl_io.cc b/native_client_sdk/src/libraries/nacl_io/nacl_io.cc
index b1134f106b905ce420fe0c7af91fe6cccb85c8bb..141c4d7a5d6cf1a31b3fe05d2cbb6bf3557c189a 100644
--- a/native_client_sdk/src/libraries/nacl_io/nacl_io.cc
+++ b/native_client_sdk/src/libraries/nacl_io/nacl_io.cc
@@ -8,16 +8,16 @@
 #include "nacl_io/kernel_intercept.h"
 #include "nacl_io/kernel_proxy.h"
 
-void nacl_io_init() {
-  ki_init(NULL);
+int nacl_io_init() {
+  return ki_init(NULL);
 }
 
-void nacl_io_uninit() {
-  ki_uninit();
+int nacl_io_uninit() {
+  return ki_uninit();
 }
 
-void nacl_io_init_ppapi(PP_Instance instance, PPB_GetInterface get_interface) {
-  ki_init_ppapi(NULL, instance, get_interface);
+int nacl_io_init_ppapi(PP_Instance instance, PPB_GetInterface get_interface) {
+  return ki_init_ppapi(NULL, instance, get_interface);
 }
 
 int nacl_io_register_fs_type(const char* fs_type, fuse_operations* fuse_ops) {