Remove redundant NULLing of outbuf_pmap

If reallocf ever failed, outbuf_pmap would already be NULL

MFC after: 1 week
X-MFC with: r300620
Reported by: cem
Sponsored by: EMC / Isilon Storage Division

lib/libc/rpc/clnt_bcast.c

@@ -348,7 +348,6 @@ rpc_broadcast_exp(rpcprog_t prog, rpcvers_t vers, rpcproc_t proc,
 			udpbufsz = fdlist[fdlistno].dsize;
 			outbuf_pmap = reallocf(outbuf_pmap, udpbufsz);
 			if (outbuf_pmap == NULL) {
-				outbuf_pmap = NULL;
 				_close(fd);
 				stat = RPC_SYSTEMERROR;
 				goto done_broad;