compositor: Attach only valid background buffers

If a background is not found,
create_buffer_from_png will return NULL.
Do not attach these buffers.

diff --git a/compositor/compositor.c b/compositor/compositor.c
index 7261dc2..cd13e4d 100644 (file)
--- a/compositor/compositor.c
+++ b/compositor/compositor.c
@@ -309,6 +309,10 @@ background_create(struct wlsc_output *output, const char *filename)
        buffer = create_buffer_from_png(output->compositor,
                                        filename,
                                        output->width, output->height);
+       if (buffer == NULL) {
+               free(background);
+               return NULL;
+       }
        buffer->attach(buffer, &background->surface);
 
        return background;