From ecd64faeb439b1ae43cacce5981f10dbf71030a8 Mon Sep 17 00:00:00 2001
From: korotkoves <korotkov.es@mipt.ru>
Date: Mon, 22 Apr 2019 11:25:56 +0300
Subject: [PATCH] tsrb: bug fix for tsrb_get_one()

---
 sys/tsrb/tsrb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/tsrb/tsrb.c b/sys/tsrb/tsrb.c
index e85ea52664..9e1a0082e7 100644
--- a/sys/tsrb/tsrb.c
+++ b/sys/tsrb/tsrb.c
@@ -32,7 +32,7 @@ static char _pop(tsrb_t *rb)
 int tsrb_get_one(tsrb_t *rb)
 {
     if (!tsrb_empty(rb)) {
-        return _pop(rb);
+        return (unsigned char)_pop(rb);
     }
     else {
         return -1;