readline/extconf.rb: rl_hook_func_t

* ext/readline/extconf.rb (rl_hook_func_t): check pointer type.
  [ruby-dev:48089] [Bug #9702]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45518 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Apr  5 00:31:21 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/readline/extconf.rb (rl_hook_func_t): check pointer type.
+	  [ruby-dev:48089] [Bug #9702]
+
 Fri Apr  4 07:13:44 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* configure.in (ac_cv_func___builtin_setjmp): should not skip

ext/readline/extconf.rb

@@ -98,7 +98,7 @@ readline.have_func("clear_history")
 readline.have_func("rl_redisplay")
 readline.have_func("rl_insert_text")
 readline.have_func("rl_delete_text")
-unless readline.have_type("rl_hook_func_t")
+unless readline.have_type("rl_hook_func_t*")
   # rl_hook_func_t is available since readline-4.2 (2001).
   # Function is removed at readline-6.3 (2014).
   # However, editline (NetBSD 6.1.3, 2014) doesn't have rl_hook_func_t.