Fix 'Language' menu exception (#400)

…if config file is not created

data/cdata/ui_scripts/patches/language.lua

@@ -1,14 +1,14 @@
 local available_languages = {"english", "english_safe", "french", "german", "italian", "polish", "portuguese",
                              "russian", "spanish", "simplified_chinese", "traditional_chinese", "japanese_partial",
                              "korean"}
-local current_language = "english"
+local current_language = "LANGUAGE"
 
 LUI.UIButtonText.IsOffsetedLanguage = function()
     return false
 end
 
-function get_current_language()
+function get_user_language()
-    current_language = game:getcurrentgamelanguage()
+    user_language = game:getcurrentgamelanguage()
 end
 
 function set_language(value)
@@ -22,7 +22,11 @@ function does_zone_folder_exists(language)
     return io.directoryexists("zone/" .. language)
 end
 
-get_current_language()
+get_user_language()
+
+if user_language ~= "" and does_zone_folder_exists(user_language) then
+    current_language = user_language
+end
 
 LUI.addmenubutton("pc_controls", {
     index = 4,

src/client/component/filesystem.cpp

@@ -14,6 +14,8 @@
 #include <utils/hook.hpp>
 #include <utils/properties.hpp>
 
+#define LANGUAGE_FILE "players2/default/language"
+
 namespace filesystem
 {
 	namespace
@@ -57,6 +59,11 @@ namespace filesystem
 
 			const auto code = game::SEH_GetCurrentLanguageName();
 
+			if (!::utils::io::file_exists(LANGUAGE_FILE) or ::utils::io::file_size(LANGUAGE_FILE) == 0)
+			{
+				::utils::io::write_file(LANGUAGE_FILE, code);
+			}
+
 			paths.push_back(path);
 
 			if (is_fallback_lang())

src/client/steam/interfaces/apps.hpp

@@ -25,9 +25,6 @@ namespace steam
 				strcpy_s(language, sizeof(language), content.data());
 				return;
 			}
-
-			// default to english if no file is found
-			strcpy_s(language, sizeof(language), "english");
 		}
 
 		virtual bool BIsSubscribed();