Added #include <unistd.h> for nice()

diff --git a/vision_test.cc b/vision_test.cc
index 28c29d3..8efc304 100644 (file)
--- a/vision_test.cc
+++ b/vision_test.cc
@@ -27,6 +27,7 @@
 #include <cmath>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 using namespace std;