fix(plugins: oomox): gtk3 wasn't exported if trying to export Cinnamon and all GTK3 theme versions

re #themix-project/oomox-gtk-theme#29 (comment)

Author: actionless

plugins/theme_oomox/oomox_plugin.py

@@ -32,6 +32,8 @@ def do_export(self):
                 make_opts += ["gtk320"]
             else:
                 make_opts += ["gtk3"]
+        else:
+            make_opts += ["gtk3", "gtk320"]
         if self.export_config[OPTION_EXPORT_CINNAMON_THEME]:
             make_opts += ["css_cinnamon"]
         if make_opts: