Upstream patch: fix segfault while video device detection.
Discovered here - https://bugs.gentoo.org/show_bug.cgi?id=458504

--- a/src/sdl/video.c.orig	2013-02-21 11:48:57.000000000 -0400
+++ b/src/sdl/video.c	2013-02-21 11:49:35.000000000 -0400
@@ -364,11 +364,17 @@
 	int n;
 	int w, h;
 	int flags = 0;
+        int status;
 
 	printf("CGA Screen Emulation\n");
 	printf("init screen: ");
 
-	SDL_Init(SDL_INIT_VIDEO);
+	status = SDL_Init(SDL_INIT_VIDEO);
+        if (status == -1)
+        {
+          fprintf(stderr, "Unable to locate video device. Exiting.\n");
+          exit(1);
+        }

 	srand(time(NULL));
 	set_icon(symbol_plane[rand() % 2][rand() % 16]);