Fixes some memory leaks in //runtime/bin

runtime/bin/main.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 <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_tools_api.h"
@@ skipping 1657 matching lines @@
   if (error != NULL) {
     Log::PrintErr("VM cleanup failed: %s\n", error);
     free(error);
   }
   if (do_vm_shutdown) {
     EventHandler::Stop();
   }
 
   // Free copied argument strings if converted.
   if (argv_converted) {
-    for (int i = 0; i < argc; i++) free(argv[i]);
+    for (int i = 0; i < argc; i++) {
+      free(argv[i]);
+    }
   }
 
   // Free environment if any.
   if (environment != NULL) {
     for (HashMap::Entry* p = environment->Start();
          p != NULL;
          p = environment->Next(p)) {
       free(p->key);
       free(p->value);
     }
     delete environment;
   }
 
   Platform::Exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }