[PATCH] sdl2: Check if window exists before updating it

[Akihiko Odaki]

A console does not have a window if the surface is a placeholder and
the console is not the first one. sdl2 cannot update the texture in
such a case.

Add a proper check for window existence. Such a check is only necessary
for the "gl" implementation as the "2d" implementation checks for the
texture, which is set only if a window exists.

Fixes: c821a58ee7 ("ui/console: Pass placeholder surface to displays")
Reported-by: Antonio Caggiano <quic_acaggian@quicinc.com>
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 ui/sdl2-gl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c
index 39cab8cde7..bbfa70eac3 100644
--- a/ui/sdl2-gl.c
+++ b/ui/sdl2-gl.c
@@ -67,6 +67,10 @@ void sdl2_gl_update(DisplayChangeListener *dcl,
 
     assert(scon->opengl);
 
+    if (!scon->real_window) {
+        return;
+    }
+
     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
     surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h);
     scon->updates++;
-- 
2.40.1