Simplify mapclass::currentarea()

It used to take a single int: the area number returned by
mapclass::area(roomx, roomy). All uses of currentarea() were called
with an extra area() call as its argument. Additionally, there's a
good reason why currentarea() should have the room coordinates: in one
of the cases that it's called, there's a special case for the ship's
coordinates. This results in the SAVE screen in the map menu being able
to show "The Ship", while the continue screen shows "Dimension VVVVVV"
instead. Therefore, why not put that exception inside currentarea()
instead, and remove a few callsite map.area() wrappers by making
currentarea() take the room x and y coordinates?

desktop_version/src/Game.cpp

@@ -5689,9 +5689,7 @@ void Game::loadsummary(void)
             summary.seconds
         );
         map.finalmode = summary.finalmode;
-        tele_currentarea = map.currentarea(
-            map.area(summary.savex, summary.savey)
-        );
+        tele_currentarea = map.currentarea(summary.savex, summary.savey);
         SDL_memcpy(tele_crewstats, summary.crewstats, sizeof(tele_crewstats));
         tele_trinkets = summary.trinkets;
     }
@@ -5714,9 +5712,7 @@ void Game::loadsummary(void)
             summary.seconds
         );
         map.finalmode = summary.finalmode;
-        quick_currentarea = map.currentarea(
-            map.area(summary.savex, summary.savey)
-        );
+        quick_currentarea = map.currentarea(summary.savex, summary.savey);
         SDL_memcpy(quick_crewstats, summary.crewstats, sizeof(quick_crewstats));
         quick_trinkets = summary.trinkets;
     }

desktop_version/src/Input.cpp

@@ -3068,11 +3068,9 @@ static void mapmenuactionpress(const bool version2_2)
         music.playef(Sound_GAMESAVED);
 
         game.savetime = game.timestring();
-        game.savearea = map.currentarea(map.area(game.roomx, game.roomy));
+        game.savearea = map.currentarea(game.roomx, game.roomy);
         game.savetrinkets = game.trinkets();
 
-        if (game.roomx >= 102 && game.roomx <= 104 && game.roomy >= 110 && game.roomy <= 111) game.savearea = loc::gettext_roomname_special("The Ship");
-
         bool success;
 
         if(map.custommodeforreal)

desktop_version/src/Map.cpp

@@ -1240,9 +1240,14 @@ void mapclass::spawncompanion(void)
     }
 }
 
-const char* mapclass::currentarea(int t)
+const char* mapclass::currentarea(const int roomx, const int roomy)
 {
-    switch(t)
+    if (roomx >= 102 && roomx <= 104 && roomy >= 110 && roomy <= 111)
+    {
+        return loc::gettext_roomname_special("The Ship");
+    }
+
+    switch (area(roomx, roomy))
     {
     case 0:
         return loc::gettext_roomname_special("Dimension VVVVVV");

desktop_version/src/Map.h

@@ -108,7 +108,7 @@ public:
 
     void spawncompanion(void);
 
-    const char* currentarea(int t);
+    const char* currentarea(int roomx, int roomy);
 
     void loadlevel(int rx, int ry);