dynamic default tab in Astrocomplex

Now, if there are no nauts available in the AstroComplex,
the default tab is the facility transfer. But, if nauts are available,
the default tab is nauts transfer.

src/game/ast2.cpp

@@ -93,8 +93,7 @@ void DrawLimbo(char plr)
     fill_rectangle(10, 52, 89, 101, 7 + plr * 3);
     InBox(165, 46, 315, 67);
     fill_rectangle(166, 47, 314, 66, 0);
-    ShBox(167, 48, 225, 65);
-    InBox(167, 48, 225, 65);  // Transfer Astronaut button
+    ShBox(167, 48, 225, 65);  // Transfer Astronaut button
     ShBox(227, 48, 256, 65);  // Send All button
     ShBox(258, 48, 313, 65);  // Facility Transfer button
     InBox(4, 128, 20, 196);
@@ -127,11 +126,8 @@ void DrawLimbo(char plr)
     display::graphics.setForegroundColor(20);
     draw_string(0, 0, "ACILITY");
     draw_string(262, 62, "TRANSFER");
-
-    fill_rectangle(166, 78, 314, 88, 10);
-    display::graphics.setForegroundColor(11);
-    draw_string(185, 85, "TRANSFER TO LOCATION");
-
+
+
     for (int i = 0; i < 5; i++) {
         char str[21];
 
@@ -205,8 +201,7 @@ void DrawLimbo(char plr)
 
 void Limbo(char plr)
 {
-    int BarA, now2;
-    int tag = OP_TRANSFER;
+    int BarA, now2, tag ;
     std::vector<int> AstroList;
 
     DrawLimbo(plr);
@@ -225,8 +220,18 @@ void Limbo(char plr)
     FadeIn(2, 10, 0, 0);
 
     if (AstroList.size()) {
+        InBox(167, 48, 225, 65);  // Default Transfer Astronaut button
+        tag = OP_TRANSFER;
+        fill_rectangle(166, 78, 314, 88, 10);
+        display::graphics.setForegroundColor(11);
+        draw_string(185, 85, "TRANSFER TO LOCATION");
         LimboText(plr, AstroList.at(now2));
     } else {
+        InBox(258, 48, 313, 65);  // Default Facility transfer button 
+        tag = OP_VISIT;
+        fill_rectangle(166, 78, 314, 88, 10);
+        display::graphics.setForegroundColor(11);
+        draw_string(203, 85, "VISIT LOCATION");
         Help((plr == 0) ? "i176" : "i177");
     }