Avoid use-after-free, fix spec@egl_khr_fence_sync@conformance.

Fixes: 9ee683f877 (egl/dri2: Add reference count for dri2_egl_display)
Cc: "12.0" <[email protected]>
Reported-by: Michel Dänzer <[email protected]>
Signed-off-by: Nicolas Boichat <[email protected]>
---
 src/egl/drivers/dri2/platform_wayland.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/egl/drivers/dri2/platform_wayland.c 
b/src/egl/drivers/dri2/platform_wayland.c
index e714e44..cbdcd76 100644
--- a/src/egl/drivers/dri2/platform_wayland.c
+++ b/src/egl/drivers/dri2/platform_wayland.c
@@ -1236,6 +1236,7 @@ dri2_initialize_wayland_drm(_EGLDriver *drv, _EGLDisplay 
*disp)
    wl_event_queue_destroy(dri2_dpy->wl_queue);
  cleanup_dpy:
    free(dri2_dpy);
+   disp->DriverData = NULL;
 
    return EGL_FALSE;
 }
@@ -1881,6 +1882,7 @@ dri2_initialize_wayland_swrast(_EGLDriver *drv, 
_EGLDisplay *disp)
    wl_event_queue_destroy(dri2_dpy->wl_queue);
  cleanup_dpy:
    free(dri2_dpy);
+   disp->DriverData = NULL;
 
    return EGL_FALSE;
 }
-- 
2.8.0.rc3.226.g39d4020

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