ipx: move extern sysctl_ipx_pprop_broadcasting to header file

include ipx.h from sysctl_net_ipx.c

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipx/sysctl_net_ipx.c b/net/ipx/sysctl_net_ipx.c
index ad7c03d..0dafcc5 100644
--- a/net/ipx/sysctl_net_ipx.c
+++ b/net/ipx/sysctl_net_ipx.c
@@ -9,14 +9,12 @@
 #include <linux/mm.h>
 #include <linux/sysctl.h>
 #include <net/net_namespace.h>
+#include <net/ipx.h>
 
 #ifndef CONFIG_SYSCTL
 #error This file should not be compiled without CONFIG_SYSCTL defined
 #endif
 
-/* From af_ipx.c */
-extern int sysctl_ipx_pprop_broadcasting;
-
 static struct ctl_table ipx_table[] = {
 	{
 		.procname	= "ipx_pprop_broadcasting",