[nautilus] meson.build: Pass -Wno-error=maybe-uninitialized

[Ernestas Kulik <ernestask src gnome org>]

commit 4c2e9da9a904d074b699508a969403d004f321f8
Author: Ernestas Kulik <ernestask gnome org>
Date:   Wed Oct 31 21:47:59 2018 +0100

    meson.build: Pass -Wno-error=maybe-uninitialized
    
    The nightly flatpak builds after
    https://gitlab.com/freedesktop-sdk/freedesktop-sdk/commit/ce54a2527555e51e4ebf4cce9cbb6259cafa89a4
    fail due to an unfortunate combination of compiler flags. This commit
    disables the error, since it’s rather inconsistent when the warning is
    spit out.

 meson.build | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/meson.build b/meson.build
index 5660153df..74a441f8e 100644
--- a/meson.build
+++ b/meson.build
@@ -54,6 +54,13 @@ add_project_arguments(
     '-Werror=strict-prototypes',
     '-Werror=undef',
     '-Werror=uninitialized',
+    # Context: 
https://gitlab.com/freedesktop-sdk/freedesktop-sdk/commit/ce54a2527555e51e4ebf4cce9cbb6259cafa89a4
+    # -O2 and -fexceptions unmask some cases of -Wmaybe-uninitialized, which
+    # become errors for some reason (I’m guessing because of the
+    # -Werror=uninitialized above, but no idea why that implies this).
+    # This being an error is nice and all, but not when its appearance is
+    # dependent on optimization level and other flags.
+    '-Wno-error=maybe-uninitialized',
   ]),
   '-D_GNU_SOURCE',
   language: 'c'