lib: Added some more missing headers.

It is weird how I could have missed these earlier...

diff --git a/lib/mtio.c b/lib/mtio.c
index 43cc1f7..3b728d0 100644 (file)
--- a/lib/mtio.c
+++ b/lib/mtio.c
@@ -18,6 +18,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
 #include <errno.h>