egl: explicitly ask for core context

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170505104101.30589-6-kraxel@redhat.com
diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index b502251..4a4d337 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -296,6 +296,7 @@
 EGLContext qemu_egl_init_ctx(void)
 {
     static const EGLint ctx_att_gl[] = {
+        EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
         EGL_NONE
     };
     EGLContext ectx;