server: error handling fixes

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/server.h b/server.h
index cd07a85..49f02a6 100644
--- a/server.h
+++ b/server.h
@@ -94,6 +94,7 @@
 extern void fio_server_set_arg(const char *);
 extern int fio_server_parse_string(const char *, char **, int *, int *, struct in_addr *);
 extern const char *fio_server_op(unsigned int);
+extern void fio_server_got_signal(int);
 
 struct thread_stat;
 struct group_run_stats;