Clean up.

config.h

@@ -3,11 +3,7 @@
 static const char *user  = "";
 static const char *group = "";
 
-#if !DEBUG
 static const int displaytimeout = 5; /* 0 to disable */
-#else
-static const int displaytimeout = 0;
-#endif
 
 /* treat a cleared input like a wrong password (color) */
 static const int failonclear = 1;

slock.c

@@ -903,6 +903,8 @@ run_loop(struct arena *arena,
                             XResizeWindow(dpy, locks[screen]->win,
                                           rre->width, rre->height);
                         }
+                        XSetWindowBackground(dpy, locks[screen]->win,
+                                             BlackPixel(dpy, screen));
                         XClearWindow(dpy, locks[screen]->win);
                         break;
                     }