http://pkgs.fedoraproject.org/cgit/xscreensaver.git/tree/xscreensaver-5.17-blurb-hndl-test-passwd.patch

--- a/driver/test-passwd.c
+++ b/driver/test-passwd.c
@@ -66,6 +66,7 @@
 Bool update_screen_layout (saver_info *si) { return 0; }
 
 const char *blurb(void) { return progname; }
+Bool in_signal_handler_p = 0;
 Atom XA_SCREENSAVER, XA_DEMO, XA_PREFS;
 
 void