From f23980100d12f4d707a585d5222f680850cc4e8c Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Mon, 20 Mar 2017 06:05:48 +0100
Subject: compat/sleep: guard against signed -> unsigned wraparound

---
 compat/sleep.hpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/compat/sleep.hpp b/compat/sleep.hpp
index fab27286..4cd7a397 100644
--- a/compat/sleep.hpp
+++ b/compat/sleep.hpp
@@ -9,14 +9,16 @@
 namespace portable
 {
 #ifdef _WIN32
-    inline void sleep(unsigned milliseconds)
+    inline void sleep(int milliseconds)
     {
-        Sleep(milliseconds);
+        if (milliseconds > 0)
+            Sleep(milliseconds);
     }
 #else
-    inline void sleep(unsigned milliseconds)
+    inline void sleep(int milliseconds)
     {
-        usleep(milliseconds * 1000U); // takes microseconds
+        if (milliseconds > 0)
+            usleep(unsigned(milliseconds) * 1000U); // takes microseconds
     }
 #endif
 }
-- 
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