Fixed VC `fstat` issue.
MODIFY
mrbgems/mruby-io/src/file.c
mrbgems/mruby-io/src/file.c
@@ -395,7 +395,7 @@ static mrb_value
mrb_file_mtime(mrb_state *mrb, mrb_value self)
{
int fd = mrb_io_fileno(mrb, self);
- struct stat st;
+ mrb_stat st;
if (mrb_fstat(fd, &st) == -1)
return mrb_false_value();

Fixed VC `fstat` issue.