[libgweather/ebassi/gtk4: 6/10] build: Default to C99 with GNU extensions

[Emmanuele Bassi <ebassi src gnome org>]

commit b4f38c38cbeaa55e7b50948ee6f1039621b3526b
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sun Oct 10 16:41:03 2021 +0100

    build: Default to C99 with GNU extensions
    
    It's 2021, there's no point in sticking with a C89 baseline.

 meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/meson.build b/meson.build
index f2edb8a2..fdc84882 100644
--- a/meson.build
+++ b/meson.build
@@ -4,6 +4,7 @@ project('libgweather', 'c',
   default_options: [
     'warning_level=2',
     'buildtype=debugoptimized',
+    'c_std=gnu99',
   ],
 )