[mutter] meson: Add -Werror=strict-aliasing

[Marge Bot <marge-bot src gnome org>]

commit 570b94fc43e72ab575c92c07ffa37b8b48f933c1
Author: Dor Askayo <dor askayo gmail com>
Date:   Sun May 8 00:09:44 2022 +0300

    meson: Add -Werror=strict-aliasing
    
    This warning can point out design issues, so it should be useful to
    have it treated as error.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2406>

 meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/meson.build b/meson.build
index d6c1e10b62..21ba74e5fa 100644
--- a/meson.build
+++ b/meson.build
@@ -427,6 +427,7 @@ if buildtype != 'plain'
     '-Werror=pointer-to-int-cast',
     '-Werror=empty-body',
     '-Werror=write-strings',
+    '-Werror=strict-aliasing',
     '-Wno-sign-compare',
     '-Wno-cast-function-type',
     '-Wno-unused-parameter',