[NaCl SDK] Modifying size_t and int to off_t.

native_client_sdk/src/libraries/nacl_io/kernel_handle.cc

Index: native_client_sdk/src/libraries/nacl_io/kernel_handle.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/kernel_handle.cc b/native_client_sdk/src/libraries/nacl_io/kernel_handle.cc
index 8f56e6786590f37358b991197f7deb1e5f7227e1..9ad4605231baababfa426c852e75a69e7c17bd82 100644
--- a/native_client_sdk/src/libraries/nacl_io/kernel_handle.cc
+++ b/native_client_sdk/src/libraries/nacl_io/kernel_handle.cc
@@ -54,8 +54,8 @@ Error KernelHandle::Init(int open_flags) {
 Error KernelHandle::Seek(off_t offset, int whence, off_t* out_offset) {
   // By default, don't move the offset.
   *out_offset = offset;
-  ssize_t base;
-  size_t node_size;
+  off_t base;
+  off_t node_size;
 
   AUTO_LOCK(handle_lock_);
   Error error = node_->GetSize(&node_size);
@@ -79,7 +79,7 @@ Error KernelHandle::Seek(off_t offset, int whence, off_t* out_offset) {
   if (base + offset < 0)
     return EINVAL;
 
-  size_t new_offset = base + offset;
+  off_t new_offset = base + offset;
 
   // Seeking past the end of the file will zero out the space between the old
   // end and the new end.