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.cpp

@@ -67,10 +67,7 @@ void entityclass::init()
     altstates = 0;
 
 
-    for (int i = 0; i < 6; i++)
-    {
-      customcrewmoods[i]=1;
-    }
+    SDL_memset(customcrewmoods, true, sizeof(customcrewmoods));
 
     flags.resize(100);
     collect.resize(100);