[PATCH] ntpd: fix build without ipv6 support

ntp_io.c was checkin the non-existing DISABLE_IPV6 define rather
than WANT_IPV6 as defined in config.h, breaking the build if
the toolchain doesn't have ipv6 support.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
---
 ntpd/ntp_io.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: ntp-4.2.4p5/ntpd/ntp_io.c
===================================================================
--- ntp-4.2.4p5.orig/ntpd/ntp_io.c
+++ ntp-4.2.4p5/ntpd/ntp_io.c
@@ -55,7 +55,7 @@
  * Set up some macros to look for IPv6 and IPv6 multicast
  */
 
-#if defined(ISC_PLATFORM_HAVEIPV6) && !defined(DISABLE_IPV6)
+#if defined(ISC_PLATFORM_HAVEIPV6) && defined(WANT_IPV6)
 
 #define INCLUDE_IPV6_SUPPORT