From 255f9f02341e595657584c1bd38045e1518de642 Mon Sep 17 00:00:00 2001
From: Camilla Berglund <elmindreda@elmindreda.org>
Date: Thu, 27 Aug 2015 20:25:28 +0200
Subject: [PATCH] Fix deadlock with negative swap interval on Aero

Fixes #587.
---
 src/wgl_context.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/wgl_context.c b/src/wgl_context.c
index 0d44c9ce..20dff1a6 100644
--- a/src/wgl_context.c
+++ b/src/wgl_context.c
@@ -602,7 +602,7 @@ void _glfwPlatformSwapBuffers(_GLFWwindow* window)
     // HACK: Use DwmFlush when desktop composition is enabled
     if (_glfwIsCompositionEnabled() && !window->monitor)
     {
-        int count = window->wgl.interval;
+        int count = abs(window->wgl.interval);
         while (count--)
             _glfw_DwmFlush();
     }