Make language screen show up once more

Now that two new variants of Spanish have been added, it would be
a shame that many players from Latin-America/Argentina may stay on
Castilian or English because they don't realize the new versions
were added for them. So now, if you've set your language in 2.4.0,
the language screen will show up once more in 2.4.1. This is done by
simply incrementing the lang_set flag to 2 - so that if it's 0 or 1,
your language setting is considered to be possibly outdated.

This shouldn't inconvenience players who don't need to select a new
language - their existing language will still be pre-selected, so they
can just hit ACTION once.

Terry confirms he did the same thing with Dicey Dungeons and says
it's a good idea (and that nobody minds).

desktop_version/src/Input.cpp

@@ -1142,7 +1142,7 @@ static void menuactionpress(void)
             loc::languagelist_curlang = game.currentmenuoption;
             loc::lang = loc::languagelist[game.currentmenuoption].code;
             loc::loadtext(false);
-            loc::lang_set = true;
+            loc::lang_set = loc::lang_set_current;
             graphics.grphx.init_translations();
         }
 

desktop_version/src/Localization.cpp

@@ -11,7 +11,7 @@
 namespace loc
 {
 
-bool lang_set = false;
+int lang_set = 0;
 bool pre_title_lang_menu = false;
 
 std::string lang = "en";

desktop_version/src/Localization.h

@@ -45,7 +45,8 @@ struct TextboxFormat
     unsigned short padtowidth; // pad to X pixels (0 to disable)
 };
 
-extern bool lang_set;
+extern int lang_set;
+static const int lang_set_current = 2;
 extern bool pre_title_lang_menu;
 
 extern std::string lang;

desktop_version/src/main.cpp

@@ -674,7 +674,7 @@ int main(int argc, char *argv[])
         game.gamestate = TITLEMODE;
     if (game.slowdown == 0) game.slowdown = 30;
 
-    if (!loc::lang_set && !loc::languagelist.empty())
+    if (loc::lang_set < loc::lang_set_current && !loc::languagelist.empty())
     {
         loc::pre_title_lang_menu = true;
         game.gamestate = TITLEMODE;