[gnome-tetravex] Use OptionFlags.NONE.

[Arnaud B. <arnaudb src gnome org>]

commit f08a9807760d4941c755630ba8d610ca7503a137
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sat Oct 12 19:00:06 2019 +0200

    Use OptionFlags.NONE.
    
    Bump GLib required version to 2.42.

 meson.build             |  2 +-
 src/gnome-tetravex.vala | 14 ++++++++++----
 2 files changed, 11 insertions(+), 5 deletions(-)
---
diff --git a/meson.build b/meson.build
index 9c596bc..19ac73f 100644
--- a/meson.build
+++ b/meson.build
@@ -20,7 +20,7 @@ localedir = join_paths (get_option ('prefix'), get_option ('localedir'))
 datadir = join_paths (get_option ('prefix'), get_option ('datadir'))
 
 # Dependencies
-glib_dep = dependency ('glib-2.0', version: '>= 2.40.0')
+glib_dep = dependency ('glib-2.0', version: '>= 2.42.0')
 gtk_dep = dependency ('gtk+-3.0', version: '>= 3.14')
 # TODO build requires vala 0.46.3 for GLib vapi
 
diff --git a/src/gnome-tetravex.vala b/src/gnome-tetravex.vala
index b59a7a8..b1b2b6d 100644
--- a/src/gnome-tetravex.vala
+++ b/src/gnome-tetravex.vala
@@ -53,16 +53,22 @@ private class Tetravex : Gtk.Application
     private const OptionEntry [] option_entries =
     {
         /* Translators: command-line option description, see 'gnome-tetravex --help' */
-        { "colors",  'c', 0, OptionArg.INT,  ref colors,    N_("Set number of colors (2-10)"),    
N_("NUMBER") },
+        { "colors",  'c', OptionFlags.NONE, OptionArg.INT,  ref colors,    N_("Set number of colors (2-10)"),
+
+        /* Translators: in the command-line options description, text to indicate the user should specify 
colors number, see 'gnome-tetravex --help' */
+                                                                           N_("NUMBER") },
 
         /* Translators: command-line option description, see 'gnome-tetravex --help' */
-        { "paused",  'p', 0, OptionArg.NONE, null,          N_("Start the game paused"),          null },
+        { "paused",  'p', OptionFlags.NONE, OptionArg.NONE, null,          N_("Start the game paused"),      
    null },
 
         /* Translators: command-line option description, see 'gnome-tetravex --help' */
-        { "size",    's', 0, OptionArg.INT,  ref game_size, N_("Set size of board (2-6)"),        N_("SIZE") 
},
+        { "size",    's', OptionFlags.NONE, OptionArg.INT,  ref game_size, N_("Set size of board (2-6)"),
+
+        /* Translators: in the command-line options description, text to indicate the user should specify 
size, see 'gnome-tetravex --help' */
+                                                                           N_("SIZE") },
 
         /* Translators: command-line option description, see 'gnome-tetravex --help' */
-        { "version", 'v', 0, OptionArg.NONE, null,          N_("Print release version and exit"), null },
+        { "version", 'v', OptionFlags.NONE, OptionArg.NONE, null,          N_("Print release version and 
exit"), null },
         {}
     };