sv_undef came back?

I just discovered that 4.018 has an sv_undef again in dbdimp.c.

Here is the patch that makes it work under bleadperl:

--- dbdimp.c~   2010-10-27 06:28:58.000000000 +0200
+++ dbdimp.c    2010-10-27 06:29:07.000000000 +0200
@@ -2444,7 +2444,7 @@
     {
       const char* clientinfo = mysql_get_client_info();
       result= clientinfo ?
-        sv_2mortal(newSVpv(clientinfo, strlen(clientinfo))) : &sv_undef;
+        sv_2mortal(newSVpv(clientinfo, strlen(clientinfo))) : &PL_sv_undef;
     }
     else if (kl == 13 && strEQ(key, "clientversion"))
     {


HTH, Regards,