Linux sandbox: style cleanup for setuid sandbox.

sandbox/linux/suid/common/suid_unsafe_environment_variables.h

 // 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.
 
 // This is a list of environment variables which the ELF loader unsets when
 // loading a SUID binary. Because they are unset rather than just ignored, they
 // aren't passed to child processes of SUID processes either.
 //
 // We need to save these environment variables before running a SUID sandbox
 // and restore them before running child processes (but after dropping root).
@@ skipping 36 matching lines @@
   "TZDIR",
   NULL,
 };
 
 // Return a malloc allocated string containing the 'saved' environment variable
 // name for a given environment variable.
 static inline char* SandboxSavedEnvironmentVariable(const char* envvar) {
   const size_t envvar_len = strlen(envvar);
   const size_t kMaxSizeT = (size_t) -1;
 
-  if (envvar_len > kMaxSizeT - 1 -8)
+  if (envvar_len > kMaxSizeT - 1 - 8)
     return NULL;
 
   const size_t saved_envvarlen = envvar_len + 1 /* NUL terminator */ +
                                               8 /* strlen("SANDBOX_") */;
   char* const saved_envvar = (char*) malloc(saved_envvarlen);
   if (!saved_envvar)
     return NULL;
 
   memcpy(saved_envvar, "SANDBOX_", 8);
   memcpy(saved_envvar + 8, envvar, envvar_len);
   saved_envvar[8 + envvar_len] = 0;
 
   return saved_envvar;
 }
 
 #endif  // SANDBOX_LINUX_SUID_SUID_UNSAFE_ENVIRONMENT_VARIABLES_H_