From 1486a205586eb5f9f3e37e20b2801c5825655152 Mon Sep 17 00:00:00 2001
From: Martin Pulec <martin.pulec@cesnet.cz>
Date: Tue, 4 Jun 2019 10:24:02 +0200
Subject: [PATCH] GL: fixed printing error

---
 src/video_display/gl.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/video_display/gl.cpp b/src/video_display/gl.cpp
index 90e013c47..812ccbbad 100644
--- a/src/video_display/gl.cpp
+++ b/src/video_display/gl.cpp
@@ -1003,7 +1003,7 @@ static void glut_init_error_callback(const char *fmt, va_list ap)
         // format the string
         auto buffer = (char *) alloca(size + 1);
         va_copy(aq, ap);
-        if (vsprintf(buffer, fmt, ap) == size) {
+        if (vsprintf(buffer, fmt, ap) >= 0) {
                 LOG(LOG_LEVEL_ERROR) << "[GL] " << buffer << "\n";
         }
         va_end(aq);