[PATCH] Fix ETA display

Should be precise within the limits of the knowledge we have.
diff --git a/fio.h b/fio.h
index d1e4e04..0844e6a 100644
--- a/fio.h
+++ b/fio.h
@@ -315,4 +315,8 @@
 
 #define DISK_UTIL_MSEC	(250)
 
+#ifndef min
+#define min(a, b)	((a) < (b) ? (a) : (b))
+#endif
+
 #endif