[NaCl SDK] Remove invalid assert from nacl_io.

native_client_sdk/src/examples/demo/nacl_io/nacl_io_demo.c

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "nacl_io_demo.h"
 
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ skipping 68 matching lines @@
 char* VprintfToNewString(const char* format, va_list args) {
   va_list args_copy;
   int length;
   char* buffer;
   int result;
 
   va_copy(args_copy, args);
   length = vsnprintf(NULL, 0, format, args);
   buffer = (char*)malloc(length + 1); /* +1 for NULL-terminator. */
   result = vsnprintf(&buffer[0], length + 1, format, args_copy);
-  assert(result == length);
+  if (result != length) {
+    assert(0);
+    return NULL;
+  }
   return buffer;
 }
 
 /**
  * Printf to a newly allocated C string.
  * @param[in] format A print format string.
  * @param[in] ... The printf arguments.
  * @return The newly constructed string. Caller takes ownership. */
 char* PrintfToNewString(const char* format, ...) {
   va_list args;
@@ skipping 257 matching lines @@
   } else if (strcmp(interface_name, PPP_MESSAGING_INTERFACE) == 0) {
     static PPP_Messaging messaging_interface = {
       &Messaging_HandleMessage,
     };
     return &messaging_interface;
   }
   return NULL;
 }
 
 PP_EXPORT void PPP_ShutdownModule() {}