Implementation: Add Portuguese to MORE_LANGUAGES (#36)

Brazilian Portuguese has one of the larger GTA communities and a long-standing
fan translation, but no way to select it: the language menu stops at Spanish and
Text.cpp has no filename for it, so a translated GXT can only be used by
overwriting AMERICAN.GXT and losing English.

This is the same shape as the Polish, Russian and Japanese entries already there
- enum value, PORTUGUESE.GXT in both lookups, menu action and row. No font set
is needed: Portuguese is Latin-1 and the existing EFIGS set already covers its
accented characters, so the default branch in InitialiseChangedLanguageSettings
handles it.

No game data is added. The player supplies PORTUGUESE.GXT themselves, exactly as
with every other language.

FEL_POR is not a key in the stock GXT, so the entry shows its key name until a
translation provides the string - the same situation as the other MORE_LANGUAGES
entries, and it is selectable either way.

src/core/Frontend.cpp

@@ -4759,6 +4759,14 @@ CMenuManager::ProcessUserInput(uint8 goDown, uint8 goUp, uint8 optionSelected, u
 				InitialiseChangedLanguageSettings();
 				SaveSettings();
 				break;
+#ifdef MORE_LANGUAGES
+			case MENUACTION_LANG_POR:
+				m_PrefsLanguage = LANGUAGE_PORTUGUESE;
+				m_bFrontEnd_ReloadObrTxtGxt = true;
+				InitialiseChangedLanguageSettings();
+				SaveSettings();
+				break;
+#endif
 			case MENUACTION_CHECKSAVE:
 			{
 				int saveSlot = aScreens[m_nCurrScreen].m_aEntries[m_nCurrOption].m_SaveSlot;

src/core/Frontend.h

@@ -267,6 +267,9 @@ enum eMenuAction
 	MENUACTION_LANG_GER,
 	MENUACTION_LANG_ITA,
 	MENUACTION_LANG_SPA,
+#ifdef MORE_LANGUAGES
+	MENUACTION_LANG_POR,
+#endif
 	MENUACTION_POPULATESLOTS_CHANGEMENU,
 	MENUACTION_CHECKSAVE,
 	MENUACTION_NEWGAME,
@@ -748,6 +751,7 @@ public:
 		LANGUAGE_POLISH,
 		LANGUAGE_RUSSIAN,
 		LANGUAGE_JAPANESE,
+		LANGUAGE_PORTUGUESE,
 #endif
 	};
 	bool GetIsMenuActive() {return !!m_bMenuActive;}

src/core/MenuScreens.cpp

@@ -80,6 +80,9 @@ CMenuScreen aScreens[] = {
 		MENUACTION_LANG_GER,	"FEL_GER", SAVESLOT_NONE, MENUPAGE_LANGUAGE_SETTINGS, 0, 0, MENUALIGN_CENTER,
 		MENUACTION_LANG_ITA,	"FEL_ITA", SAVESLOT_NONE, MENUPAGE_LANGUAGE_SETTINGS, 0, 0, MENUALIGN_CENTER,
 		MENUACTION_LANG_SPA,    "FEL_SPA", SAVESLOT_NONE, MENUPAGE_LANGUAGE_SETTINGS, 0, 0, MENUALIGN_CENTER,
+#ifdef MORE_LANGUAGES
+		MENUACTION_LANG_POR,	"FEL_POR", SAVESLOT_NONE, MENUPAGE_LANGUAGE_SETTINGS, 0, 0, MENUALIGN_CENTER,
+#endif
 		MENUACTION_GOBACK,		"FEDS_TB", SAVESLOT_NONE, MENUPAGE_NONE, 0, 0, MENUALIGN_CENTER,
 	},
 

src/text/Text.cpp

@@ -71,6 +71,9 @@ CText::Load(void)
 	case CMenuManager::LANGUAGE_JAPANESE:
 		sprintf(filename, "JAPANESE.GXT");
 		break;
+	case CMenuManager::LANGUAGE_PORTUGUESE:
+		sprintf(filename, "PORTUGUESE.GXT");
+		break;
 #endif
 	}
 
@@ -275,6 +278,9 @@ CText::LoadMissionText(char *MissionTableName)
 	case CMenuManager::LANGUAGE_JAPANESE:
 		sprintf(filename, "JAPANESE.GXT");
 		break;
+	case CMenuManager::LANGUAGE_PORTUGUESE:
+		sprintf(filename, "PORTUGUESE.GXT");
+		break;
 #endif
 	}
 	CTimer::Suspend();