* io.c (io_unread): cast as long the value for extra_max.

  [ruby-core:44137] [Bug #6257]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35255 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index fac42c710b..ca7f1b2e92 100644
--- a/io.c
+++ b/io.c
@@ -455,7 +455,7 @@ io_unread(rb_io_t *fptr)
     }
 
     /* add extra offset for removed '\r' in rbuf */
-    extra_max = pos - fptr->rbuf.len;
+    extra_max = (long)(pos - fptr->rbuf.len);
     p = fptr->rbuf.ptr + fptr->rbuf.off;
     for (i = 0; i < fptr->rbuf.len; i++) {
 	if (*p == '\n') newlines++;