Fix uint8_t/unit32_t mix, always use wordsize access

src/trusted/validator_ragel/unreviewed/validator_x86_64.rl

 /*
  * Copyright (c) 2012 The Native Client 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 <assert.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ skipping 293 matching lines @@
 
 }%%
 
 %% write data;
 
 Bool ValidateChunkAMD64(const uint8_t *data, size_t size,
                         enum validation_options options,
                         const NaClCPUFeaturesX86 *cpu_features,
                         validation_callback_func user_callback,
                         void *callback_data) {
-  uint8_t *valid_targets = BitmapAllocate(size);
-  uint8_t *jump_dests = BitmapAllocate(size);
+  bitmap_word *valid_targets = BitmapAllocate(size);
+  bitmap_word *jump_dests = BitmapAllocate(size);
   const uint8_t *current_position;
   const uint8_t *end_of_bundle;
   int result = TRUE;
 
   CHECK(size % kBundleSize == 0);
 
   if (!valid_targets || !jump_dests) {
     result = FALSE;
     goto error_detected;
   }
@@ skipping 35 matching lines @@
   }
 
   result &= ProcessInvalidJumpTargets(data, size, valid_targets, jump_dests,
                                       user_callback, callback_data);
 
 error_detected:
   free(jump_dests);
   free(valid_targets);
   return result;
 }