Fix the rpcb_getaddr() definition to match its declaration.

Submitted by:	Sebastian Huber <sebastian dot huber at embedded-brains dot de>

lib/libc/rpc/rpcb_clnt.c

@@ -1010,7 +1010,7 @@ done:
  *
  * Assuming that the address is all properly allocated
  */
-int
+bool_t
 rpcb_getaddr(rpcprog_t program, rpcvers_t version, const struct netconfig *nconf,
     struct netbuf *address, const char *host)
 {

sys/rpc/rpcb_clnt.c

@@ -1051,7 +1051,7 @@ done:
  *
  * Assuming that the address is all properly allocated
  */
-int
+bool_t
 rpcb_getaddr(program, version, nconf, address, host)
 	rpcprog_t program;
 	rpcvers_t version;