merges r24271 from trunk into ruby_1_9_1.

--
* io.c (argf_eof): should not have reached EOF before trying to
  read.  based on a patch by Heesob Park <phasis AT gmail.com> at
  [ruby-core:24559].  [ruby-core:24557]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@24449 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index 48a639212..9ed097777 100644
--- a/io.c
+++ b/io.c
@@ -8041,7 +8041,7 @@ argf_to_io(VALUE argf)
 static VALUE
 argf_eof(VALUE argf)
 {
-    if (ARGF.current_file) {
+    if (RTEST(ARGF.current_file)) {
 	if (ARGF.init_p == 0) return Qtrue;
 	ARGF_FORWARD(0, 0);
 	if (rb_io_eof(ARGF.current_file)) {