From 3451f7e760309802b1297c9fc9db95e42ec525ab Mon Sep 17 00:00:00 2001
From: Gregory Hainaut <gregory.hainaut@gmail.com>
Date: Thu, 7 Jan 2016 21:48:06 +0100
Subject: [PATCH] gsdx-ogl: handle invalid gl_lengh in debug message

Mesa intel sets it to -1.

Close #1089
---
 plugins/GSdx/GSDeviceOGL.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/GSdx/GSDeviceOGL.cpp b/plugins/GSdx/GSDeviceOGL.cpp
index 6f2780b67d..73db97de5f 100644
--- a/plugins/GSdx/GSDeviceOGL.cpp
+++ b/plugins/GSdx/GSDeviceOGL.cpp
@@ -1522,7 +1522,7 @@ void GSDeviceOGL::CheckDebugLog()
 // Note: used as a callback of DebugMessageCallback. Don't change the signature
 void GSDeviceOGL::DebugOutputToFile(GLenum gl_source, GLenum gl_type, GLuint id, GLenum gl_severity, GLsizei gl_length, const GLchar *gl_message, const void* userParam)
 {
-	std::string message(gl_message, gl_length);
+	std::string message(gl_message, gl_length >= 0 ? gl_length : strlen(gl_message));
 	std::string type, severity, source;
 	static int sev_counter = 0;
 	switch(gl_type) {