From b53c2a7c9d569a60c58e3b1c3249fc2fcf17d485 Mon Sep 17 00:00:00 2001
From: Elias Naur <mail@eliasnaur.com>
Date: Wed, 30 Oct 2019 20:41:20 +0100
Subject: [PATCH] app/internal/window: introduce and use nilEGLDisplay

Updates gio#52

Signed-off-by: Elias Naur <mail@eliasnaur.com>
---
 app/internal/window/egl.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/internal/window/egl.go b/app/internal/window/egl.go
index 55e3b8ea..a8b7d9ed 100644
--- a/app/internal/window/egl.go
+++ b/app/internal/window/egl.go
@@ -40,6 +40,7 @@ type eglContext struct {
 }
 
 var (
+	nilEGLDisplay          _EGLDisplay
 	nilEGLSurface          _EGLSurface
 	nilEGLContext          _EGLContext
 	nilEGLConfig           _EGLConfig
@@ -194,7 +195,7 @@ func hasExtension(exts []string, ext string) bool {
 
 func createContext(disp _EGLNativeDisplayType) (*eglContext, error) {
 	eglDisp := eglGetDisplay(disp)
-	if eglDisp == 0 {
+	if eglDisp == nilEGLDisplay {
 		return nil, fmt.Errorf("eglGetDisplay(_EGL_DEFAULT_DISPLAY) failed: 0x%x", eglGetError())
 	}
 	major, minor, ret := eglInitialize(eglDisp)