retroarch corruption

gistfile1.txt

diff --git a/cores/dynamic_dummy.c b/cores/dynamic_dummy.c
index 7e8594793..054f6b515 100644
--- a/cores/dynamic_dummy.c
+++ b/cores/dynamic_dummy.c
@@ -126,7 +126,8 @@ void libretro_dummy_retro_reset(void)
 void libretro_dummy_retro_run(void)
 {
    dummy_input_poll_cb();
-   dummy_video_cb(frame_buf, 320, 240, 640);
+   if (frame_buf)
+       dummy_video_cb(frame_buf, 320, 240, 640);
 }

 /* This should never be called, it's only used as a placeholder. */