Compile with -Werror by default

This is what we do in development version with autotools

diff --git a/configure b/configure
index aab9e7d..3629804 100755 (executable)
--- a/configure
+++ b/configure
@@ -49,7 +49,7 @@ def get_configs(meson):
                  '-Dgst-editing-services:disable_introspection=true',
                  '-Dgst-devtools:disable_introspection=true']
 
-     return []
+     return ['-Dwerror=true']
 
 
 def configure_meson(args):