[PATCH] Fixup nice() return value and duplicate volatiles
diff --git a/fio.c b/fio.c
index 412f002..3656694 100644
--- a/fio.c
+++ b/fio.c
@@ -1355,7 +1355,7 @@
 		}
 	}
 
-	if (nice(td->nice) < 0) {
+	if (nice(td->nice) == -1) {
 		td_verror(td, errno);
 		goto err;
 	}