[network-manager-applet] build/meson: enable -Wvla and -Wunused-but-set-variable warnings

[Thomas Haller <thaller src gnome org>]

commit d370868722c5f990167820cefab9173c20c2b9e2
Author: Thomas Haller <thaller redhat com>
Date:   Thu Dec 21 10:25:03 2017 +0100

    build/meson: enable -Wvla and -Wunused-but-set-variable warnings

 meson.build |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/meson.build b/meson.build
index b232f5a..1995d05 100644
--- a/meson.build
+++ b/meson.build
@@ -94,11 +94,11 @@ if nma_debug
     '-Wno-missing-field-initializers',
     '-Wno-pragmas',
     '-Wno-sign-compare',
-    '-Wno-unused-but-set-variable',
     '-Wno-unused-parameter',
     '-Wshadow',
     '-Wstrict-prototypes',
-    '-Wundef'
+    '-Wundef',
+    '-Wvla',
   ]
 
   common_flags += cc.get_supported_arguments(test_cflags)