Fix check for whether setnetgrent has a return value

Index: meson.build
--- meson.build.orig
+++ meson.build
@@ -189,8 +189,11 @@ setnetgrent_return_src = '''
   };
 '''
 
-config_h.set('HAVE_SETNETGRENT_RETURN', cc.compiles(setnetgrent_return_src, name: 'setnetgrent return support'))
-
+if config_h.get('HAVE_NETGROUP_H')
+  config_h.set('HAVE_SETNETGRENT_RETURN', cc.compiles(setnetgrent_return_src, name: 'setnetgrent return support', args: '-DHAVE_NETGROUP_H'))
+else
+  config_h.set('HAVE_SETNETGRENT_RETURN', cc.compiles(setnetgrent_return_src, name: 'setnetgrent return support'))
+endif
 # Select wether to use libsystemd-login, libelogind or ConsoleKit for session tracking
 session_tracking = get_option('session_tracking')
 enable_logind = (session_tracking != 'ConsoleKit')