From http://www.jwz.org/xscreensaver/xscreensaver-5.30.tar.gz

[xscreensaver] / driver / windows.c

diff --git a/driver/windows.c b/driver/windows.c
index 2bdc146c187f012dfedf6e1fed8df10d789ba82b..29edc82b66b1349fb3a3f6879a83fbd6f69ea4f6 100644 (file)
--- a/driver/windows.c
+++ b/driver/windows.c
@@ -1,5 +1,5 @@
 /* windows.c --- turning the screen black; dealing with visuals, virtual roots.
- * xscreensaver, Copyright (c) 1991-2011 Jamie Zawinski <jwz@jwz.org>
+ * xscreensaver, Copyright (c) 1991-2014 Jamie Zawinski <jwz@jwz.org>
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
@@ -396,10 +396,10 @@ ensure_no_screensaver_running (Display *dpy, Screen *screen)
          && type != None)
        {
          unsigned char *id;
-         if (!XGetWindowProperty (dpy, kids[i], XA_SCREENSAVER_ID, 0, 512,
+         if (XGetWindowProperty (dpy, kids[i], XA_SCREENSAVER_ID, 0, 512,
                                   False, XA_STRING, &type, &format, &nitems,
                                   &bytesafter, &id)
-             == Success
+             != Success
              || type == None)
            id = (unsigned char *) "???";