[pango/compiler-warnings: 4/4] Add a few more warning flags

[Matthias Clasen <matthiasc src gnome org>]

commit 6e70241de63ba7d4412419154142bb5e84995edd
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Aug 1 22:39:25 2019 -0400

    Add a few more warning flags
    
    Add warning flags for the just fixed warnings
    to the build. This is in order to ensure that
    pango builds in ci as a subproject of gtk.

 meson.build | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/meson.build b/meson.build
index 1d0b7d2c..619e6f33 100644
--- a/meson.build
+++ b/meson.build
@@ -87,6 +87,7 @@ elif cc.get_id() == 'gcc' or cc.get_id() == 'clang'
     '-Wno-uninitialized',
     '-Wno-shadow',
     '-Werror=implicit',
+    '-Werror=implicit-fallthrough',
     '-Werror=nonnull',
     '-Werror=init-self',
     '-Werror=main',
@@ -101,6 +102,7 @@ elif cc.get_id() == 'gcc' or cc.get_id() == 'clang'
     '-Werror=pointer-to-int-cast',
     '-Werror=empty-body',
     '-Werror=write-strings',
+    '-Werror=unused-but-set-variable',
     '-Wundef', # FIXME: https://bugzilla.gnome.org/show_bug.cgi?id=792481
   ]