io.c: fix typo

* io.c (prep_io): fix typo of struct member name.
  [ruby-core:77550] [Bug #12829]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56393 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index 17ec6baa81..35f6fb699b 100644
--- a/io.c
+++ b/io.c
@@ -7375,7 +7375,7 @@ prep_io(int fd, int fmode, VALUE klass, const char *path)
     fp->mode = fmode;
     if (!io_check_tty(fp)) {
 #ifdef __CYGWIN__
-	fp->fmode |= FMODE_BINMODE;
+	fp->mode |= FMODE_BINMODE;
 	setmode(fd, O_BINARY);
 #endif
     }