fs: use IsSafeJsInt instead of IsNumber for ftruncate

PR-URL: #26572
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

src/node_file.cc

@@ -1130,7 +1130,7 @@ static void FTruncate(const FunctionCallbackInfo<Value>& args) {
   CHECK(args[0]->IsInt32());
   const int fd = args[0].As<Int32>()->Value();
 
-  CHECK(args[1]->IsNumber());
+  CHECK(IsSafeJsInt(args[1]));
   const int64_t len = args[1].As<Integer>()->Value();
 
   FSReqBase* req_wrap_async = GetReqWrap(env, args[2]);