* file.c (rb_get_path_check): prefer #to_path over #to_str. a patch

originally written by me, and modified by Nobuyoshi Nakada.
  [ruby-core:24257]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27045 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Thu Mar 25 23:17:16 2010  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* file.c (rb_get_path_check): prefer #to_path over #to_str.  a patch
+	  originally written by me, and modified by Nobuyoshi Nakada.
+	  [ruby-core:24257]
+
 Thu Mar 25 18:10:08 2010  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
 
 	* NEWS: Array#{uniq,uniq!} can take a block. see [ruby-dev:37998]

file.c

@@ -129,18 +129,14 @@ rb_get_path_check(VALUE obj, int level)
     if (insecure_obj_p(obj, level)) {
 	rb_insecure_operation();
     }
-    tmp = rb_check_string_type(obj);
-    if (!NIL_P(tmp)) goto exit;
 
     CONST_ID(to_path, "to_path");
-    if (rb_respond_to(obj, to_path)) {
-	tmp = rb_funcall(obj, to_path, 0, 0);
-    }
-    else {
+    tmp = rb_check_funcall(obj, to_path, 0, 0);
+    if (tmp == Qundef) {
 	tmp = obj;
     }
     StringValue(tmp);
-  exit:
+
     tmp = file_path_convert(tmp);
     StringValueCStr(tmp);
     if (obj != tmp && insecure_obj_p(tmp, level)) {