sa_len.c: do not include ipx.h, the IPX code is disabled

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/inet/rpc/sa_len.c

@@ -18,9 +18,9 @@
 
 #include <sys/socket.h>
 #include <netinet/in.h>
-#include <netipx/ipx.h>
 #include <sys/un.h>
 #if 0
+#include <netipx/ipx.h>
 #include <netash/ash.h>
 #include <netatalk/at.h>
 #include <netax25/ax25.h>