src: use const in constant args.Length()

PR-URL: #33555
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

src/node_file.cc

@@ -1056,7 +1056,7 @@ static void Symlink(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
   Isolate* isolate = env->isolate();
 
-  int argc = args.Length();
+  const int argc = args.Length();
   CHECK_GE(argc, 4);
 
   BufferValue target(isolate, args[0]);
@@ -1085,7 +1085,7 @@ static void Link(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
   Isolate* isolate = env->isolate();
 
-  int argc = args.Length();
+  const int argc = args.Length();
   CHECK_GE(argc, 3);
 
   BufferValue src(isolate, args[0]);
@@ -1112,7 +1112,7 @@ static void ReadLink(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
   Isolate* isolate = env->isolate();
 
-  int argc = args.Length();
+  const int argc = args.Length();
   CHECK_GE(argc, 3);
 
   BufferValue path(isolate, args[0]);
@@ -1155,7 +1155,7 @@ static void Rename(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
   Isolate* isolate = env->isolate();
 
-  int argc = args.Length();
+  const int argc = args.Length();
   CHECK_GE(argc, 3);
 
   BufferValue old_path(isolate, args[0]);