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console: add same displaychangelistener registration pre-condition 

Catch an invalid state. Mainly useful for documentation purposes.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20170406120513.638-3-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Marc-André Lureau 2017-04-06 14:05:12 +02:00 committed by Gerd Hoffmann
parent 6905b93447
commit e0665c3b5f
1 changed files with 2 additions and 0 deletions
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2
ui/console.c
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@ -1410,6 +1410,8 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
static DisplaySurface *dummy;
QemuConsole *con;
assert(!dcl->ds);
if (dcl->ops->dpy_gl_ctx_create) {
/* display has opengl support */
assert(dcl->con);