File xscreensaver-background.patch of Package xscreensaver
change default background to black
================================================================================
Index: utils/resources.c
===================================================================
--- a/utils/resources.c
+++ b/utils/resources.c
@@ -176,7 +176,7 @@ get_pixel_resource (Display *dpy, Colorm
if (s) free (s);
{
- Bool black_p = (strlen(res_class) >= 10 &&
+ Bool black_p = ! (strlen(res_class) >= 10 &&
!strcasecmp ("Background",
res_class + strlen(res_class) - 10));
if (!ok)