Mac/clang: Uncontentious fixes.

base/crypto/signature_creator_mac.cc

 // Copyright (c) 2009 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 "base/crypto/signature_creator.h"
 
 #include <stdlib.h>
 
 #include "base/crypto/cssm_init.h"
 #include "base/logging.h"
@@ skipping 13 matching lines @@
                                          key->key(),
                                          &result->sig_handle_);
   if (crtn) {
     NOTREACHED();
     return NULL;
   }
 
   crtn = CSSM_SignDataInit(result->sig_handle_);
   if (crtn) {
     NOTREACHED();
-    return false;
+    return NULL;
   }
 
   return result.release();
 }
 
 SignatureCreator::SignatureCreator() : sig_handle_(0) {
   EnsureCSSMInit();
 }
 
 SignatureCreator::~SignatureCreator() {
@@ skipping 24 matching lines @@
   }
 
   signature->assign(sig.Data, sig.Data + sig.Length);
   kCssmMemoryFunctions.free_func(sig.Data, NULL); // Release data alloc'd
                                                   // by CSSM
 
   return true;
 }
 
 }  // namespace base