(do_ewmh_fullscreen): Check that what != NULL before

calling wm_supports.

diff --git a/src/xterm.c b/src/xterm.c
index e3fb3ae1c141caae0abe2d6d51e0d8d788d8f145..3650f3cc541313908f944751c18e18fa7aa7d510 100644 (file)
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -8442,7 +8442,7 @@ do_ewmh_fullscreen (f)
           break;
         }
 
-      if (!wm_supports (f, what)) return 0;
+      if (what != NULL && !wm_supports (f, what)) return 0;
 
 
       Fx_send_client_event (frame, make_number (0), frame,