From 7924fca23e96b9b5bdfd400beeb09e42a7a4c6de Mon Sep 17 00:00:00 2001
From: ttate <ttate@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 13 Nov 2003 11:46:31 +0000
Subject: [PATCH] Merge the patch of [ruby-ext:02242]. (Thanks, Masahiro Sakai)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4953 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/dl/handle.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ext/dl/handle.c b/ext/dl/handle.c
index 9ca2fa0a54..95b6dc74dc 100644
--- a/ext/dl/handle.c
+++ b/ext/dl/handle.c
@@ -52,11 +52,11 @@ rb_dlhandle_initialize(int argc, VALUE argv[], VALUE self)
 
   switch (rb_scan_args(argc, argv, "11", &lib, &flag)) {
   case 1:
-    clib = StringValuePtr(lib);
+    clib = NIL_P(lib) ? NULL : StringValuePtr(lib);
     cflag = RTLD_LAZY | RTLD_GLOBAL;
     break;
   case 2:
-    clib = StringValuePtr(lib);
+    clib = NIL_P(lib) ? NULL : StringValuePtr(lib);
     cflag = NUM2INT(flag);
     break;
   default: