buildworld failed on sparc64

[Dmitry Luhtionov]

Upgrading from 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r227463:227464:
to 10.4-STABLE

cc -O2 -pipe  -std=gnu99    -I/usr/obj/usr/src/tmp/legacy/usr/include -c
/usr/src/usr.bin/rpcgen/rpc_main.c -o rpc_main.o
/usr/src/usr.bin/rpcgen/rpc_main.c:85: warning: implicit declaration of
function 'nitems'
/usr/src/usr.bin/rpcgen/rpc_main.c:85: error: initializer element is not
constant
/usr/src/usr.bin/rpcgen/rpc_main.c:89: error: initializer element is not
constant
*** Error code 1