client/server: send back nr_jobs and error exit code

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/fio.h b/fio.h
index df0daf6..be684ca 100644
--- a/fio.h
+++ b/fio.h
@@ -482,8 +482,8 @@
 #define __fio_stringify(x)	__fio_stringify_1(x)
 
 extern int exitall_on_terminate;
-extern int thread_number;
-extern int nr_process, nr_thread;
+extern unsigned int thread_number;
+extern unsigned int nr_process, nr_thread;
 extern int shm_id;
 extern int groupid;
 extern int terse_output;