[vte/vte-0-66: 1/5] build: Assert on non-supported option on stable branch

[Christian Persch <chpe src gnome org>]

commit 1e38c581b8cc45be46e0bb1f2fec2df50712bb3b
Author: Christian Persch <chpe src gnome org>
Date:   Sat Aug 14 21:45:46 2021 +0200

    build: Assert on non-supported option on stable branch

 meson.build | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/meson.build b/meson.build
index 4f5a7c57..4a5a530f 100644
--- a/meson.build
+++ b/meson.build
@@ -192,6 +192,8 @@ if get_option('gtk3')
 endif
 
 if get_option('gtk4')
+  assert(false, 'not supported on this branch; use git master')
+
   gtk4_version_cppflags = []
 
   ver = gtk4_min_req_version.split('.')