Turn crew rescued/mood vectors into arrays

Since they're always fixed-size, they don't need to be dynamically-sized
vectors.

entityclass::customcrewmoods is now a proper bool instead of an int now,
and I replaced the hardcoded constant 6 with a static const int Game
attribute to make it easier to change.

desktop_version/src/Entity.h

@@ -207,7 +207,7 @@ public:
     int customplatformtile;
     bool customwarpmode, customwarpmodevon, customwarpmodehon;
     std::string customscript;
-    int customcrewmoods[6];
+    bool customcrewmoods[Game::numcrew];
 };
 
 extern entityclass obj;