master 1da5b2c: Avoid segfault when set-fontset-font is called from non-GUI frames

[Eli Zaretskii]

branch: master
commit 1da5b2c60b6ad3747046cbe9060d35a6d110a97c
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Avoid segfault when set-fontset-font is called from non-GUI frames
    
    * src/fontset.c (check_fontset_name): Avoid crashes if this is
    called from a non-GUI frame.  (Bug#49782)
---
 src/fontset.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/fontset.c b/src/fontset.c
index 332be6c..52c7e38 100644
--- a/src/fontset.c
+++ b/src/fontset.c
@@ -1356,6 +1356,9 @@ check_fontset_name (Lisp_Object name, Lisp_Object *frame)
   int id;
   struct frame *f = decode_live_frame (*frame);
 
+  if (!FRAME_WINDOW_P (f))
+    error ("Can't use fontsets in non-GUI frames");
+
   XSETFRAME (*frame, f);
 
   if (EQ (name, Qt))