Fix mac build, missing ;

runtime/bin/file_macos.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_MACOS)
 
 #include "bin/file.h"
 
 #include <errno.h>  // NOLINT
@@ skipping 322 matching lines @@
   // target. The link might have changed before the readlink call.
   const int kBufferSize = 1024;
   char target[kBufferSize];
   size_t target_size = TEMP_FAILURE_RETRY(
       readlink(pathname, target, kBufferSize));
   if (target_size <= 0) {
     return NULL;
   }
   char* target_name = reinterpret_cast<char*>(malloc(target_size + 1));
   if (target_name == NULL) {
-    return NULL
+    return NULL;
   }
   memmove(target_name, target, target_size);
   target_name[target_size] = '\0';
   return target_name;
 }
 
 
 bool File::IsAbsolutePath(const char* pathname) {
   return (pathname != NULL && pathname[0] == '/');
 }
@@ skipping 71 matching lines @@
   return (file_1_info.st_ino == file_2_info.st_ino &&
           file_1_info.st_dev == file_2_info.st_dev) ?
       File::kIdentical :
       File::kDifferent;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)